SARS-CoV-2 Omicron variant (English Wikipedia)

"Första fallet av omikron upptäckt i Sverige" [The first case of omicron detection in Sweden]. www.aftonbladet.se (in Swedish). 29 November 2021. Archived from the original on 30 November 2021. Retrieved 29 November 2021.
Österman H (11 January 2022). "Undergrupp av omikron ökar: "Kan vara ännu mer smittsam"" (in Swedish). Aftonbladet. Archived from the original on 11 January 2022. Retrieved 17 January 2022.

ages.at (Global: low place; English: low place)

"SARS-CoV-2-Varianten in Österreich". AGES - Österreichische Agentur für Gesundheit und Ernährungssicherheit (in German). Retrieved 20 December 2021.

alarabiya.net (Global: 598^th place; English: 1,085^th place)

english.alarabiya.net

"Saudi Arabia detects first case of COVID-19 Omicron variant in Kingdom". Al Arabiya English. December 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.

albaniandailynews.com (Global: low place; English: low place)

"First Case of 'Omicron' Variant Confirmed in Albania". Albanian Daily News. 23 December 2021. Retrieved 2 January 2022.

aljazeera.com (Global: 268^th place; English: 215^th place)

"Australia: Omicron death, false negative COVID results". Al Jazeera. 27 December 2021. Archived from the original on 27 December 2021. Retrieved 27 December 2021.
"Cuba to update domestic vaccine to battle Omicron". Al Jazeera. 2 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.

ami.mr (Global: low place; English: low place)

fr.ami.mr

"AMI - Des membres du gouvernement commentent les résultats du conseil des ministres". fr.ami.mr. 30 December 2021. Retrieved 9 January 2022.

angop.ao (Global: low place; English: low place)

"Burkina Faso com dois casos de variante de covid-19 Omicron" [Burkina Faso with two cases of COVID-19 Omicron variant]. ANGOP. 18 December 2021. Retrieved 2 January 2022.
"Covid-19: Angola confirms Omicron's circulation". Angola Press News Agency. 24 December 2021. Retrieved 2 January 2022.

aninews.in (Global: 2,615^th place; English: 1,406^th place)

"Lebanon's total Omicron cases rise to 433". ANI News. Xinhua. Retrieved 26 December 2021.
"Myanmar confirms four cases of Omicron variant of COVID-19". ANI News. Retrieved 2 January 2022.
"First case of Omicron detected in Maldives". ANI News. Retrieved 9 December 2021.

ansa.it (Global: 493^rd place; English: 1,932^nd place)

"COVID: Omicron accountts for 28% of cases in Italy, will soon be dominant". ANSA.en. 23 December 2021. Archived from the original on 24 December 2021. Retrieved 28 December 2021.

arab.news (Global: 6,427^th place; English: 3,981^st place)

"Tunisia records first case of omicron variant". Arab News. 3 December 2021. Archived from the original on 8 December 2021. Retrieved 5 December 2021.

archive.today (Global: 14^th place; English: 14^th place)

Nathan Bartlett (9 July 2024). "From FLiRT to FLuQE: what to know about the latest COVID variants on the rise". The Conversation. ISSN 2431-2134. Wikidata Q127329080. Archived from the original on 10 July 2024.

as.com (Global: 229^th place; English: 502^nd place)

en.as.com

"Covid live updates today: Omicron variant, symptoms, vaccines efficacy, restrictions..." en.as. 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Sanjuan LM (7 November 2022). "The reason why the new variant of covid-19 is called the Hound of Hades". Diario AS. Retrieved 11 January 2025.

associatestimes.com (Global: low place; English: low place)

Byron, Anglina (1 January 2022). "Dr Laws confirms two cases of Omicron variant in St Kitts and Nevis". Associates Times a Caribbean News website. Retrieved 2 January 2022.

azernews.az (Global: low place; English: 9,225^th place)

"Azerbaijan detects COVID-19 Omicron variant". AzerNews.az. 10 January 2022. Retrieved 10 January 2022. Twelve people have tested positive for the COVID-19 Omicron variant in Azerbaijan.

bbc.co.uk (Global: 8^th place; English: 10^th place)

"Covid infections rising again across UK - ONS". BBC News. 11 March 2022. Archived from the original on 13 March 2022. Retrieved 12 March 2022.
Mundasad S (10 August 2023). "What we know about the Covid variant EG.5 dubbed 'Eris'". BBC News. BBC. Archived from the original on 18 September 2023. Retrieved 10 August 2023.
"LIVE – Covid: 'Staggering' Omicron case numbers expected – top health official". BBC News. 15 December 2021. Archived from the original on 22 December 2021. Retrieved 15 December 2021. See entry for 10:05

bbc.com (Global: 20^th place; English: 30^th place)

"New XEC Covid variant: What are the symptoms and is it spreading in the UK?". BBC News Online. 18 September 2024. Retrieved 26 September 2024.
"Covid: First UK death recorded with Omicron variant". BBC News. 13 December 2021. Archived from the original on 20 December 2021. Retrieved 13 December 2021.
"The puzzle of America's record Covid hospital rate". BBC News. 13 January 2022. Archived from the original on 14 January 2022. Retrieved 14 January 2022.

biorxiv.org (Global: 5,061^st place; English: 5,698^th place)

Yadav PD, Gupta N, Potdar V, Mohandas S, Sahay RR, Sarkale P, et al. (January 2022). An in vitro and in vivo approach for the isolation of Omicron variant from human clinical specimens. p. 2022–01.02.474750. doi:10.1101/2022.01.02.474750. Archived from the original on 16 January 2022. Retrieved 16 January 2022.

bjnews.com.cn (Global: 1,192^nd place; English: 4,736^th place)

畅, 刘 (13 December 2021). "天津从入境人员中检出奥密克戎变异株，为中国内地首次检出" [The Omicron mutant strain was detected in Tianjin from immigrants, which is the first detection in Mainland China]. The Beijing News. Retrieved 13 December 2021.

blesk.cz (Global: 3,415^th place; English: 8,799^th place)

"Koronavirus ONLINE: Válek smetl povinné očkování 60+. A 5982 případů za sobotu v ČR". Blesk.cz (in Czech). Archived from the original on 20 December 2021. Retrieved 20 December 2021.

bm.ge (Global: low place; English: low place)

"Omicron Cases Rise to 600 in Georgia". bm.ge. 7 January 2022. Retrieved 8 January 2022.

bna.bh (Global: low place; English: low place)

"The Kingdom of Bahrain detects a case of the Omicron variant in an incoming traveller with no local contact". Bahrain News Agency. 11 December 2021. Retrieved 13 December 2021.

bt.dk (Global: 2,786^th place; English: 3,751^st place)

"To personer er indrejst i Danmark med coronavarianten Omikron" [Two people have entered Denmark with the corona variant Omicron]. www.bt.dk (in Danish). 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.

canada.ca (Global: 1,712^th place; English: 1,063^rd place)

"COVID-19: Summary data about travellers, testing and compliance". Government of Canada. 14 May 2021. Archived from the original on 4 August 2022. Retrieved 29 July 2022.

caribbeannationalweekly.com (Global: low place; English: low place)

McLeod, Sheri-Kae (7 January 2022). "Antigua Confirms First Case of Omicron". Caribbean News. Retrieved 9 January 2022.

cbc.ca (Global: 115^th place; English: 82^nd place)

"B.C. limits indoor gatherings, cancels New Year's Eve events as Omicron picks up speed". CBC News. 17 December 2021. Archived from the original on 20 December 2021. Retrieved 17 December 2021.
"Highly mutated COVID virus variant BA.2.86 showing up in multiple countries". CBC. 22 August 2023. Retrieved 30 August 2023.
"WHO monitoring 2 more Omicron sub-variants known as BA.4 and BA.5". Canadian Broadcasting Corporation. 11 April 2022. Archived from the original on 13 April 2022. Retrieved 13 April 2022.

cbslocal.com (Global: 680^th place; English: 412^th place)

baltimore.cbslocal.com

Maddipatla M, Roy M (26 November 2021). "Maryland-Based Vaccine Manufacturer Developing COVID-19 Vaccine That Targets Omicron Variant". Reuters. Archived from the original on 28 November 2021. Retrieved 30 November 2021.

cbsnews.com (Global: 108^th place; English: 80^th place)

"COVID variant NB.1.8.1 hits U.S. What to know about symptoms, new booster vaccine restrictions - CBS News". www.cbsnews.com. 27 May 2025. Retrieved 9 June 2025.

cdc.gov (Global: 218^th place; English: 212^th place)

cdc.gov

"Risk Assessment Summary for SARS CoV-2 Sublineage BA.2.86 | CDC". www.cdc.gov. 23 August 2023. Retrieved 30 August 2023.
"COVID-19 Activity Increases as Prevalence of JN.1 Variant Continues to Rise". Centers for Disease Control and Prevention. 5 January 2024. Retrieved 11 January 2024.
"COVID-19 Variants in Wastewater". 7 June 2024.
"Omicron Variant: What You Need to Know". Centers for Disease Control and Prevention. 20 December 2021. Archived from the original on 27 January 2022. Retrieved 27 January 2022.
CDC COVID-19 Response Team (December 2021). "SARS-CoV-2 B.1.1.529 (Omicron) Variant - United States, December 1-8, 2021". MMWR. Morbidity and Mortality Weekly Report. 70 (50). Center for Disease Control: 1731–1734. doi:10.15585/mmwr.mm7050e1. PMC 8675659. PMID 34914670. S2CID 245071514. Archived from the original on 20 December 2021. Retrieved 17 December 2021.

covid.cdc.gov

"COVID Data Tracker". Centers for Disease Control and Prevention. 28 March 2020. Archived from the original on 22 May 2021. Retrieved 29 March 2022.
"Variant Proportions". Centers for Disease Control and Prevention. 28 March 2020. Archived from the original on 24 August 2020. Retrieved 12 March 2022.
"COVID Data Tracker". 28 March 2020. Archived from the original on 24 August 2020. Retrieved 12 March 2022.
"COVID Data Tracker". Centers for Disease Control and Prevention. 28 March 2020. Archived from the original on 22 May 2021. Retrieved 21 December 2021.

cdgn.org.au (Global: low place; English: low place)

"Variants of concern". CDGN. Retrieved 7 January 2022.

channelnewsasia.com (Global: 1,127^th place; English: 691^st place)

Hamzah F (12 October 2022). "CNA Explains: What you need to know about the XBB COVID-19 variant". channelnewsasia.com. Archived from the original on 8 December 2022. Retrieved 13 October 2022.

charite.de (Global: low place; English: low place)

"Study on the origins of Omicron retracted". www.charite.de. 20 December 2022. Archived from the original on 24 December 2022. Retrieved 24 December 2022. In a subsequent analysis of residual samples, they were found to be contaminated. It is no longer possible to establish the source of the contamination.

chinanews.com.cn (Global: 2,979^th place; English: low place)

"湖南长沙从入境人员中检出2例新冠病毒奥密克戎变异株感染者" [2 cases of coronavirus Omicron variant detected from incoming persons in Changsha, Hunan Province]. 18 December 2021.

chronicle.gi (Global: low place; English: low place)

"Travel restrictions tightened as Rock confirms 24 Omicron cases". 17 December 2021. Retrieved 20 December 2021.

cnbc.com (Global: 220^th place; English: 155^th place)

Spencer K (10 January 2022). "Pfizer CEO says omicron vaccine will be ready in March". CNBC. Archived from the original on 26 January 2022. Retrieved 27 January 2022.
Gilchrist K (24 June 2022). "UK Covid cases surge following Queen's Jubilee celebrations, new variants become dominant". CNBC. Archived from the original on 28 June 2022. Retrieved 24 June 2022.

cnn.com (Global: 28^th place; English: 26^th place)

cnn.com

"Live updates: Omicron variant". Cable News Network. 29 November 2021. Archived from the original on 30 November 2021. Retrieved 29 November 2021.
Goodman B (29 March 2022). "Omicron subvariant BA.2 is now the dominant strain of Covid-19 in the US, CDC says". CNN. Archived from the original on 29 March 2022. Retrieved 29 March 2022.
Kaitlan Collins and Kate Sullivan (29 November 2021). "Biden says new Omicron variant is 'cause for concern, not a cause for panic'". CNN. Archived from the original on 2 December 2021. Retrieved 1 December 2021.

cnnespanol.cnn.com

"Confirman primer caso positivo de variante ómicron en Puerto Rico". CNN en Español (in Spanish). 14 December 2021. Retrieved 14 December 2021.
Sorto, Marlon (25 December 2021). "República Dominicana confirma primer caso de variante ómicron de covid-19" [Dominican Republic confirms first case of Omicron variant of COVID-19]. CNN Espanol. Retrieved 2 January 2022.

edition.cnn.com

"Omicron is now the dominant variant in France". CNN. 31 December 2021. Archived from the original on 31 December 2021. Retrieved 31 December 2021.

cnnbrasil.com.br (Global: 3,706^th place; English: 7,768^th place)

"O que se sabe sobre os primeiros casos confirmados da variante Ômicron no Brasil" [What is known about the first confirmed cases of the Ômicron variant in Brazil]. CNN Brasil (in Brazilian Portuguese). 30 November 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"Passa para 6 o número de casos suspeitos da variante Ômicron investigados no Brasil" [The number of suspected cases of the Ômicron variant investigated in Brazil goes to 6]. CNN Brasil (in Brazilian Portuguese). 30 November 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"Sinovac prevê atualização da Coronavac para variante Ômicron em até três meses" [Sinovac plans to update Coronavac to the Omicron variant within three months]. CNN Brazil (in Portuguese). 7 December 2021. Archived from the original on 9 December 2021. Retrieved 9 December 2021.

cnnchile.com (Global: 9,282^nd place; English: low place)

"ISP confirmó 30 casos de la nueva variante Ómicron a nivel nacional". CNN Chile (in Spanish). 16 December 2021. Archived from the original on 16 December 2021. Retrieved 19 December 2021.

cnnindonesia.com (Global: 1,737^th place; English: 2,788^th place)

"Indonesia Laporkan 3.779 Kasus Omicron". CNNIndonesia.com (in Indonesian). 8 February 2022. Retrieved 8 February 2022.

cnnphilippines.com (Global: 2,993^rd place; English: 1,624^th place)

"PH detects 4th imported Omicron case". CNN Philippines. 27 December 2021.

cov-lineages.org (Global: low place; English: low place)

"cov-lineages.org". Archived from the original on 27 March 2022. Retrieved 11 August 2023.
"Cov-Lineages". cov-lineages.org. Retrieved 15 January 2022. Updated frequently.
"Lineage B.1.1.529". cov-lineages.org. Cov-Lineages. Retrieved 19 December 2021.

covariants.org (Global: low place; English: low place)

"Variant: 21K (Omicron)". covariants.org. CoVariants. 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021. Variant 21K (Omicron) appears to have arisen in November 2021, possibly in South Africa.

covid19-sciencetable.ca (Global: low place; English: low place)

"Ontario Dashboard". Ontario COVID-19 Science Advisory Table. Archived from the original on 17 March 2021. Retrieved 12 December 2021.

covid19genomics.dk (Global: low place; English: low place)

"Genomic overview of SARS-CoV-2 in Denmark". Danish Covid-19 Genome Consortium. 29 January 2022. Archived from the original on 20 December 2021. Retrieved 29 January 2022.

ctvnews.ca (Global: 768^th place; English: 482^nd place)

ctvnews.ca

"New COVID-19 restrictions in effect for parts of Canada; some productions cancelled". CTVNews. 20 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.
"Tracking variants of the novel coronavirus in Canada". CTV News. 4 February 2021. Retrieved 29 July 2022.

montreal.ctvnews.ca

"Quebec shutting down schools, bars, gyms tonight as COVID-19 cases soar". CTV News Montreal. 20 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.

cubitanow.com (Global: low place; English: low place)

noticias.cubitanow.com

"Ascienden a 44 los casos de Ómicron en Cuba" [Cuba: 44 cases of Omicron in Cuba]. Cubita Now (in Spanish). 27 December 2021. Retrieved 30 December 2021.
"Ascienden a 92 los casos de ómicron confirmados en Cuba" [Confirmed omicron cases in Cuba amount to 92]. Cubita Now. 4 January 2022. Retrieved 9 January 2022.

cyprus-mail.com (Global: 6,937^th place; English: 4,863^rd place)

"Coronavirus: 28 more people found positive for Omicron". Cyprus Mail. 17 December 2021. Retrieved 19 December 2021.

dailyfinland.fi (Global: low place; English: low place)

"53,600 COVID infections diagnosed in 1 week, 140 deaths in 2 weeks". clickittefaq. 13 January 2022. Retrieved 13 January 2022. The total number of cases of the Omicron variant was 523 until Wednesday.

deseret.com (Global: 1,230^th place; English: 680^th place)

Scribner H (21 December 2021). "Doctor reveals new nightly omicron variant symptom". Deseret News. Archived from the original on 2 January 2022. Retrieved 1 January 2022.

digi24.ro (Global: 6,342^nd place; English: 7,298^th place)

"MS: Încă două cazuri de infectare cu varianta Omicron au fost confirmate în România" [Ministry of Health: Two more cases of Omicron infection confirmed in Romania]. digi24.ro (in Romanian). 17 December 2021. Retrieved 18 December 2021. Până în prezent, în România au fost confirmate 13 cazuri cu varianta OMICRON a virusului SARS-Cov-2. [So far, 13 cases of the OMICRON variant of SARS-Cov-2 have been confirmed in Romania.]
"Au fost descoperite încă 9 cazuri de infectare cu varianta Omicron în România" [9 more cases of Omicron infection discovered in Romania]. digi24.ro (in Romanian). 23 December 2021. Retrieved 24 December 2021.

doi.org (Global: 2^nd place; English: 2^nd place)

Yadav PD, Gupta N, Potdar V, Mohandas S, Sahay RR, Sarkale P, et al. (January 2022). An in vitro and in vivo approach for the isolation of Omicron variant from human clinical specimens. p. 2022–01.02.474750. doi:10.1101/2022.01.02.474750. Archived from the original on 16 January 2022. Retrieved 16 January 2022.
Poudel S, Ishak A, Perez-Fernandez J, Garcia E, León-Figueroa DA, Romaní L, et al. (December 2021). "Highly mutated SARS-CoV-2 Omicron variant sparks significant concern among global experts – What is known so far?". Travel Medicine and Infectious Disease. 45 102234. doi:10.1016/j.tmaid.2021.102234. PMC 8666662. PMID 34896326.
Quarleri J, Galvan V, Delpino MV (February 2022). "Omicron variant of the SARS-CoV-2: a quest to define the consequences of its high mutational load". GeroScience. 44 (1): 53–56. doi:10.1007/s11357-021-00500-4. PMC 8683309. PMID 34921354.
Gowrisankar A, Priyanka TM, Banerjee S (10 January 2022). "Omicron: a mysterious variant of concern". European Physical Journal Plus. 137 (1): 100. Bibcode:2022EPJP..137..100G. doi:10.1140/epjp/s13360-021-02321-y. PMC 8743750. PMID 35036269.
Vitiello A, Ferrara F, Auti AM, Di Domenico M, Boccellino M (July 2022). "Advances in the Omicron variant development". Journal of Internal Medicine. 292 (1): 81–90. doi:10.1111/joim.13478. PMC 9115048. PMID 35289434.
Yao L, Zhu KL, Jiang XL, Wang XJ, Zhan BD, Gao HX, et al. (June 2022). "Omicron subvariants escape antibodies elicited by vaccination and BA.2.2 infection". The Lancet. Infectious Diseases. 22 (8): 1116–1117. doi:10.1016/s1473-3099(22)00410-8. PMC 9212811. PMID 35738299.
Ahmed SF, Quadeer AA, McKay MR (January 2022). "SARS-CoV-2 T Cell Responses Elicited by COVID-19 Vaccines or Infection Are Expected to Remain Robust against Omicron". Viruses. 14 (1): 79. doi:10.3390/v14010079. PMC 8781795. PMID 35062283.
Altarawneh HN, Chemaitelly H, Ayoub HH, Tang P, Hasan MR, Yassine HM, et al. (July 2022). "Effects of Previous Infection and Vaccination on Symptomatic Omicron Infections". The New England Journal of Medicine. 387 (1): 21–34. doi:10.1056/NEJMoa2203965. PMC 9258753. PMID 35704396. S2CID 249677809.
Nemet I, Kliker L, Lustig Y, Zuckerman N, Erster O, Cohen C, et al. (February 2022). "Third BNT162b2 Vaccination Neutralization of SARS-CoV-2 Omicron Infection". The New England Journal of Medicine. 386 (5): 492–494. doi:10.1056/NEJMc2119358. PMC 8823651. PMID 34965337.
Cao Y, Yisimayi A, Jian F, Song W, Xiao T, Wang L, et al. (June 2022). "BA.2.12.1, BA.4 and BA.5 escape antibodies elicited by Omicron infection". Nature. 608 (7923): 593–602. Bibcode:2022Natur.608..593C. doi:10.1038/s41586-022-04980-y. PMC 9385493. PMID 35714668.
Hachmann NP, Miller J, Collier AY, Ventura JD, Yu J, Rowe M, et al. (July 2022). "Neutralization Escape by SARS-CoV-2 Omicron Subvariants BA.2.12.1, BA.4, and BA.5". The New England Journal of Medicine. 387 (1): 86–88. doi:10.1056/NEJMc2206576. PMC 9258748. PMID 35731894. S2CID 249956777.
Viana R, Moyo S, Amoako DG, Tegally H, Scheepers C, Althaus CL, et al. (March 2022). "Rapid epidemic expansion of the SARS-CoV-2 Omicron variant in southern Africa". Nature. 603 (7902): 679–686. Bibcode:2022Natur.603..679V. doi:10.1038/s41586-022-04411-y. PMC 8942855. PMID 35042229.
Dyer O (December 2021). "Covid-19: South Africa's surge in cases deepens alarm over omicron variant". BMJ. 375 n3013. doi:10.1136/bmj.n3013. PMID 34862184. S2CID 244842008.
Gu H, Krishnan P, Ng DY, Chang LD, Liu GY, Cheng SS, et al. (February 2022). "Probable Transmission of SARS-CoV-2 Omicron Variant in Quarantine Hotel, Hong Kong, China, November 2021". Emerging Infectious Diseases. 28 (2): 460–462. doi:10.3201/eid2802.212422. PMC 8798678. PMID 34860154.
Planas D, Saunders N, Maes P, Guivel-Benhassine F, Planchais C, Buchrieser J, et al. (February 2022). "Considerable escape of SARS-CoV-2 Omicron to antibody neutralization". Nature. 602 (7898): 671–675. Bibcode:2022Natur.602..671P. doi:10.1038/s41586-021-04389-z. hdl:2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339121. PMID 35016199. S2CID 256823009.
Saxena SK, Kumar S, Ansari S, Paweska JT, Maurya VK, Tripathi AK, et al. (May 2022). "Transmission dynamics and mutational prevalence of the novel Severe acute respiratory syndrome coronavirus-2 Omicron Variant of Concern". Journal of Medical Virology. 94 (5): 2160–2166. doi:10.1002/jmv.27611. PMC 9015611. PMID 35050521.
Wei C, Shan KJ, Wang W, Zhang S, Huan Q, Qian W (December 2021). "Evidence for a mouse origin of the SARS-CoV-2 Omicron variant". Journal of Genetics and Genomics = Yi Chuan Xue Bao. 48 (12): 1111–1121. doi:10.1016/j.jgg.2021.12.003. PMC 8702434. PMID 34954396.
Alkhatib M, Salpini R, Carioti L, Ambrosio FA, D'Anna S, Duca L, et al. (April 2022). Perez DR (ed.). "Update on SARS-CoV-2 Omicron Variant of Concern and Its Peculiar Mutational Profile". Microbiology Spectrum. 10 (2): e0273221. doi:10.1128/spectrum.02732-21. PMC 9045195. PMID 35352942.
Tarcsai KR, Corolciuc O, Tordai A, Ongrádi J (June 2022). "SARS-CoV-2 infection in HIV-infected patients: potential role in the high mutational load of the Omicron variant emerging in South Africa". GeroScience. 44 (5): 2337–2345. doi:10.1007/s11357-022-00603-6. PMC 9225796. PMID 35739343.
Zungu N, Mabaso M, Ramlagan S, Simbayi L, Moyo S, Shisana O, et al. (May 2022). "Is There Risk Compensation among HIV Infected Youth and Adults 15 Years and Older on Antiretroviral Treatment in South Africa? Findings from the 2017 National HIV Prevalence, Incidence, Behaviour and Communication Survey". International Journal of Environmental Research and Public Health. 19 (10): 6156. doi:10.3390/ijerph19106156. PMC 9141949. PMID 35627693.
Fischer C, Maponga TG, Yadouleton A, Abílio N, Aboce E, Adewumi P, et al. (December 2022). "RETRACTED: Gradual emergence followed by exponential spread of the SARS-CoV-2 Omicron variant in Africa". Science. 378 (6623) eadd8737. doi:10.1126/science.add8737. PMID 36454863. S2CID 254150265. (Retracted, see doi:10.1126/science.adg2821, PMID 36537892, Retraction Watch)
Mallapaty S (6 December 2022). "Surprising Omicron origins study comes under scrutiny". Nature. 612 (7940): 387–388. Bibcode:2022Natur.612..387M. doi:10.1038/d41586-022-04357-1. PMID 36474049. S2CID 254402519.
Callaway E (December 2021). "Heavily mutated Omicron variant puts scientists on alert". Nature. 600 (7887): 21. Bibcode:2021Natur.600...21C. doi:10.1038/d41586-021-03552-w. PMID 34824381. S2CID 244660616.
Vogel G (22 May 2022). "New versions of Omicron are masters of immune evasion". Science. 376 (6594): 679–680. doi:10.1126/science.adc9448. PMID 35549399. Archived from the original on 7 March 2023. Retrieved 20 November 2022.
Cella E, Benedetti F, Fabris S, Borsetti A, Pezzuto A, Ciotti M, et al. (2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Archived from the original on 29 October 2023. Retrieved 1 December 2023.
Khandia R, Singhal S, Alqahtani T, Kamal MA, El-Shall NA, Nainu F, et al. (June 2022). "Emergence of SARS-CoV-2 Omicron (B.1.1.529) variant, salient features, high global health concerns and strategies to counter it amid ongoing COVID-19 pandemic". Environmental Research. 209 112816. Bibcode:2022ER....20912816K. doi:10.1016/j.envres.2022.112816. PMC 8798788. PMID 35093310.
Hong Q, Han W, Li J, Xu S, Wang Y, Xu C, et al. (April 2022). "Molecular basis of receptor binding and antibody neutralization of Omicron". Nature. 604 (7906): 546–552. Bibcode:2022Natur.604..546H. doi:10.1038/s41586-022-04581-9. PMID 35228716. S2CID 247167987.
Mileto D, Micheli V, Fenizia C, Cutrera M, Gagliardi G, Mancon A, et al. (December 2022). "Reduced neutralization of SARS-CoV-2 Omicron variant by BNT162b2 vaccinees' sera: a preliminary evaluation". Emerging Microbes & Infections. 11 (1): 790–792. doi:10.1080/22221751.2022.2045878. PMC 8920392. PMID 35196967.
Zhang L, Mann M, Syed ZA, Reynolds HM, Tian E, Samara NL, et al. (November 2021). "Furin cleavage of the SARS-CoV-2 spike is modulated by O-glycosylation". Proceedings of the National Academy of Sciences of the United States of America. 118 (47) e2109905118. Bibcode:2021PNAS..11809905Z. doi:10.1073/pnas.2109905118. PMC 8617502. PMID 34732583. S2CID 242937417.
Walls AC, Park YJ, Tortorici MA, Wall A, McGuire AT, Veesler D (April 2020). "Structure, Function, and Antigenicity of the SARS-CoV-2 Spike Glycoprotein". Cell. 181 (2): 281–292.e6. doi:10.1016/j.cell.2020.02.058. PMC 7102599. PMID 32155444.
Kudriaeva AA, Butenko IO, Saratov GA, Ri MT, Mokrushina YA, Bondarev AA, et al. (2025). "Mutational pressure promotes release of public CD8+ T cell epitopes by proteasome from SARS-CoV-2 RBD of Omicron and its current lineages". iScience. 28 (3). Bibcode:2025iSci...28k1873K. doi:10.1016/j.isci.2025.111873. PMC 11889684. PMID 40060909.
Arora P, Zhang L, Rocha C, Sidarovich A, Kempf A, Schulz S, et al. (June 2022). "Comparable neutralisation evasion of SARS-CoV-2 omicron subvariants BA.1, BA.2, and BA.3". The Lancet. Infectious Diseases. 22 (6): 766–767. doi:10.1016/S1473-3099(22)00224-9. PMC 9005119. PMID 35427493.
Mohapatra RK, Kandi V, Sarangi AK, Verma S, Tuli HS, Chakraborty S, et al. (July 2022). "The recently emerged BA.4 and BA.5 lineages of Omicron and their global health concerns amid the ongoing wave of COVID-19 pandemic - Correspondence". International Journal of Surgery. 103 106698. doi:10.1016/j.ijsu.2022.106698. PMC 9176102. PMID 35690362.
Vauhkonen H, Nguyen PT, Kant R, Plyusnin I, Erdin M, Kurkela S, et al. (June 2022). "Introduction and Rapid Spread of SARS-CoV-2 Omicron Variant and Dynamics of BA.1 and BA.1.1 Sublineages, Finland, December 2021". Emerging Infectious Diseases. 28 (6): 1229–1232. doi:10.3201/eid2806.220515. PMC 9155872. PMID 35378057.
Rahimi F, Talebi Bezmin Abadi A (March 2022). "The Omicron subvariant BA.2: Birth of a new challenge during the COVID-19 pandemic". International Journal of Surgery. 99 106261. doi:10.1016/j.ijsu.2022.106261. PMC 8837492. PMID 35167986.
Yamasoba D, Kimura I, Nasser H, Morioka Y, Nao N, Ito J, et al. (9 June 2022). "Virological characteristics of the SARS-CoV-2 Omicron BA.2 spike". Cell. 185 (12): 2103–2115. bioRxiv 10.1101/2022.02.14.480335v1. doi:10.1016/j.cell.2022.04.035. PMC 9057982. PMID 35568035. S2CID 246905491.
Mohapatra RK, Kandi V, Tuli HS, Chakraborty C, Dhama K (August 2022). "The recombinant variants of SARS-CoV-2: Concerns continues amid COVID-19 pandemic". Journal of Medical Virology. 94 (8): 3506–3508. doi:10.1002/jmv.27780. PMC 9088633. PMID 35419806.
Del Rio C, Malani PN (June 2022). "COVID-19 in 2022-The Beginning of the End or the End of the Beginning?". JAMA. 327 (24): 2389–2390. doi:10.1001/jama.2022.9655. PMID 35622357. S2CID 249096741.
Sheward DJ, Kim C, Fischbach J, Sato K, Muschiol S, Ehling RA, et al. (November 2022). "Omicron sublineage BA.2.75.2 exhibits extensive escape from neutralising antibodies". The Lancet Infectious Diseases. 22 (11): 1538–1540. doi:10.1016/S1473-3099(22)00663-6. PMC 9560757. PMID 36244347.
Cella, Eleonora; Benedetti, Francesca; Fabris, Silvia; Borsetti, Alessandra; Pezzuto, Aldo; Ciotti, Marco; et al. (18 March 2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Retrieved 12 December 2023.
Wannigama, Dhammika Leshan; Amarasiri, Mohan; Phattharapornjaroen, Phatthranit; Hurst, Cameron; Modchang, Charin; Chadsuthi, Sudarat; et al. (4 March 2024). "Wastewater-based epidemiological surveillance of SARS-CoV-2 new variants BA.2.86 and offspring JN.1 in south and Southeast Asia". Journal of Travel Medicine. doi:10.1093/jtm/taae040. ISSN 1195-1982.
Scarpa F, Sanna D, Benvenuto D, Borsetti A, Azzena I, Casu M, et al. (3 December 2022). "Genetic and Structural Data on the SARS-CoV-2 Omicron BQ.1 Variant Reveal Its Low Potential for Epidemiological Expansion". International Journal of Molecular Sciences. 23 (23) 15264. doi:10.3390/ijms232315264. PMC 9739521. PMID 36499592.
Uriu K, Okumura K, Uwamino Y, Chen L, Tolentino JE, Asakura H, Nagashima M, Sadamasu K, Yoshimura K, Ito J, Sato K; Genotype to Phenotype Japan (G2P-Japan) Consortium (2025). "Virological characteristics of the SARS-CoV-2 NB.1.8.1 variant". The Lancet. Infectious Diseases. doi:10.1016/S1473-3099(25)00356-1. PMID 40489985.
Guo, Caiwan; Yu, Yuanling; Liu, Jingyi; Jian, Fanchong; Yang, Sijie; Song, Weiliang; et al. (2025). "Antigenic and virological characteristics of SARS-CoV-2 variants BA.3.2, XFG, and NB.1.8.1". The Lancet Infectious Diseases. 25 (7): e374 – e377. doi:10.1016/S1473-3099(25)00308-1.
Kaku, Yu; Okumura, Kaho; Kawakubo, Shusuke; Uriu, Keiya; Chen, Luo; Kosugi, Yusuke; et al. (1 December 2024). "Virological characteristics of the SARS-CoV-2 XEC variant". The Lancet. 24 (12): e736. doi:10.1016/S1473-3099(24)00731-X. ISSN 1473-3099. PMID 39521009. Retrieved 25 July 2025.
Guo, Caiwan; Yu, Yuanling; Liu, Jingyi; Jian, Fanchong; Yang, Sijie; Song, Weiliang; et al. (1 July 2025). "Antigenic and virological characteristics of SARS-CoV-2 variants BA.3.2, XFG, and NB.1.8.1". The Lancet. 25 (7): e374 – e377. doi:10.1016/S1473-3099(25)00308-1. ISSN 1473-3099. PMID 40484018. Retrieved 25 July 2025.
Wang R, Chen J, Wei GW (December 2021). "Mechanisms of SARS-CoV-2 Evolution Revealing Vaccine-Resistant Mutations in Europe and America" (PDF). The Journal of Physical Chemistry Letters. 12 (49): 11850–11857. doi:10.1021/acs.jpclett.1c03380. PMC 8672435. PMID 34873910. Archived (PDF) from the original on 18 December 2021. Retrieved 27 January 2022.
Cao Y, Wang J, Jian F, Xiao T, Song W, Yisimayi A, et al. (February 2022). "Omicron escapes the majority of existing SARS-CoV-2 neutralizing antibodies". Nature. 602 (7898): 657–663. doi:10.1038/d41586-021-03796-6. PMC 8866119. PMID 35016194. S2CID 245455422.
Liu L, Iketani S, Guo Y, Chan JF, Wang M, Liu L, et al. (February 2022). "Striking antibody evasion manifested by the Omicron variant of SARS-CoV-2". Nature. 602 (7898): 676–681. doi:10.1038/d41586-021-03826-3. PMID 35016198. S2CID 245462866.
Mohsin M, Mahmud S (May 2022). "Omicron SARS-CoV-2 variant of concern: A review on its transmissibility, immune evasion, reinfection, and severity". Medicine. 101 (19) e29165. doi:10.1097/MD.0000000000029165. PMC 9276130. PMID 35583528. S2CID 248858919.
Bobrovitz N, Ware H, Ma X, Li Z, Hosseini R, Cao C, et al. (May 2023). "Protective effectiveness of previous SARS-CoV-2 infection and hybrid immunity against the omicron variant and severe disease: a systematic review and meta-regression". The Lancet Infectious Diseases. 23 (5): 556–567. doi:10.1016/S1473-3099(22)00801-5. PMC 10014083. PMID 36681084.
Hirose R, Itoh Y, Ikegaya H, Miyazaki H, Watanabe N, Yoshida T, et al. (19 January 2022). "Differences in environmental stability among SARS-CoV-2 variants of concern: Omicron has higher stability". bioRxiv 10.1101/2022.01.18.476607.
Zhou H, Møhlenberg M, Thakor JC, Tuli HS, Wang P, Assaraf YG, et al. (September 2022). "Sensitivity to Vaccines, Therapeutic Antibodies, and Viral Entry Inhibitors and Advances To Counter the SARS-CoV-2 Omicron Variant". Clinical Microbiology Reviews. 35 (3) e00014–22. doi:10.1128/cmr.00014-22. PMC 9491202. PMID 35862736.
Ferguson N, Ghani A, Hinsley W, Volz E (22 December 2021). Hospitalisation risk for Omicron cases in England (Technical report). WHO Collaborating Centre for Infectious Disease Modelling, MRC Centre for Global Infectious Disease Analysis. Imperial College London. doi:10.25561/93035. Report 50. Archived (PDF) from the original on 23 December 2021.
Cele S, Jackson L, Khoury DS, Khan K, Moyo-Gwete T, Tegally H, et al. (COMMIT-KZN Team) (February 2022). "Omicron extensively but incompletely escapes Pfizer BNT162b2 neutralization". Nature. 602 (7898): 654–656. Bibcode:2022Natur.602..654C. doi:10.1038/s41586-021-04387-1. PMC 8866126. PMID 35016196. S2CID 245879254.
Callaway E (December 2021). "Omicron likely to weaken COVID vaccine protection". Nature. 600 (7889): 367–368. Bibcode:2021Natur.600..367C. doi:10.1038/d41586-021-03672-3. PMID 34880488. S2CID 245007078.
Arbel R, Hammerman A, Sergienko R, Friger M, Peretz A, Netzer D, et al. (December 2021). "BNT162b2 Vaccine Booster and Mortality Due to Covid-19". The New England Journal of Medicine. 385 (26): 2413–2420. doi:10.1056/NEJMoa2115624. PMC 8728797. PMID 34879190.
Bar-On YM, Goldberg Y, Mandel M, Bodenheimer O, Freedman L, Alroy-Preis S, et al. (December 2021). "Protection against Covid-19 by BNT162b2 Booster across Age Groups". The New England Journal of Medicine. 385 (26): 2421–2430. doi:10.1056/NEJMoa2115926. PMC 8728796. PMID 34879188.
Wee LE, Lim JT, Tay AT, Chiew CJ, Ong B, Lye DC, et al. (30 August 2024). "Autoimmune Sequelae After Delta or Omicron Variant SARS-CoV-2 Infection in a Highly Vaccinated Cohort". JAMA Network Open. 7 (8) e2430983. doi:10.1001/jamanetworkopen.2024.30983. ISSN 2574-3805. PMC 11364997. PMID 39212988.
Suryawanshi RK, Chen IP, Ma T, Syed AM, Brazer N, Saldhi P, et al. (May 2022). "Limited cross-variant immunity from SARS-CoV-2 Omicron without vaccination". Nature. 607 (7918): 351–355. Bibcode:2022Natur.607..351S. doi:10.1038/s41586-022-04865-0. PMC 9279157. PMID 35584773. S2CID 248890159.
Shin DH, Smith DM, Choi JY (2022). "SARS-CoV-2 Omicron Variant of Concern: Everything You Wanted to Know about Omicron but Were Afraid to Ask". Yonsei Medical Journal. 63 (11): 977–983. doi:10.3349/ymj.2022.0383. PMC 9629902. PMID 36303305.
CDC COVID-19 Response Team (December 2021). "SARS-CoV-2 B.1.1.529 (Omicron) Variant - United States, December 1-8, 2021". MMWR. Morbidity and Mortality Weekly Report. 70 (50). Center for Disease Control: 1731–1734. doi:10.15585/mmwr.mm7050e1. PMC 8675659. PMID 34914670. S2CID 245071514. Archived from the original on 20 December 2021. Retrieved 17 December 2021.
Antonelli M, Pujol JC, Spector TD, Ourselin S, Steves CJ (June 2022). "Risk of long COVID associated with delta versus omicron variants of SARS-CoV-2". The Lancet. 399 (10343): 2263–2264. doi:10.1016/S0140-6736(22)00941-2. ISSN 0140-6736. PMC 9212672. PMID 35717982.
Gordon AC, Mouncey PR, Al-Beidh F, Rowan KM, Nichol AD, Arabi YM, et al. (April 2021). "Interleukin-6 Receptor Antagonists in Critically Ill Patients with Covid-19". The New England Journal of Medicine. 384 (16): 1491–1502. doi:10.1056/NEJMoa2100433. PMC 7953461. PMID 33631065.
Cathcart AL, Havenar-Daughton C, Lempp FA, Ma D, Schmid M, Agostini ML, et al. (2021). "The dual function monoclonal antibodies VIR-7831 and VIR-7832 demonstrate potent in vitro and in vivo activity against SARS-CoV-2". bioRxiv 10.1101/2021.03.09.434607.
McCallum M, Czudnochowski N, Rosen LE, Zepeda SK, Bowen JE, Dillen JR, et al. (2021). "Structural basis of SARS-CoV-2 Omicron immune evasion and receptor engagement". bioRxiv 10.1101/2021.12.28.474380.
Cameroni E, Saliba C, Bowen JE, Rosen LE, Culap K, Pinto D, et al. (December 2021). "Broadly neutralizing antibodies overcome SARS-CoV-2 Omicron antigenic shift". bioRxiv. 602 (7898). doi:10.1038/d41586-021-03825-4. PMC 8687478. PMID 34931194.
Cao Y, Wang J, Jian F, Xiao T, Song W, Yisimayi A, et al. (February 2022). "Omicron escapes the majority of existing SARS-CoV-2 neutralizing antibodies". Nature. 602 (7898): 657–663. doi:10.1038/d41586-021-03796-6. PMC 8866119. PMID 35016194. S2CID 245455422.
Maxmen A (December 2021). "Omicron blindspots: why it's hard to track coronavirus variants". Nature. 600 (7890): 579. Bibcode:2021Natur.600..579M. doi:10.1038/d41586-021-03698-7. PMID 34916668. S2CID 245262198.

downtoearth.org.in (Global: low place; English: 6,403^rd place)

"Omicron in southern Africa: Mozambique is worried for its economy, especially tourism". Bahrain News Agency. 10 December 2021. Retrieved 10 December 2021.

drive.google.com (Global: 1,343^rd place; English: 1,354^th place)

"Omicron Spread in South Africa". p. 6. Archived from the original on 4 December 2021. Retrieved 4 December 2021.

dw.com (Global: 204^th place; English: 353^rd place)

"COVID: Germany records first death from omicron variant". DW. 23 December 2021. Archived from the original on 24 December 2021. Retrieved 23 December 2021.

ebc.com.br (Global: 2,752^nd place; English: 6,664^th place)

agenciabrasil.ebc.com.br

"Anvisa recomenda restrições de voo diante de nova variante de covid-19" [Anvisa recommends flight restrictions in view of the new covid-19 variant]. agenciabrasil.ebc.com.br. 26 November 2021. Archived from the original on 26 November 2021. Retrieved 27 November 2021.

eklinika.rs (Global: low place; English: low place)

"Omikron soj stigao u Srbiju, potvrdila dr Tanja Jovanović" [Omicron strain has arrived in Serbia, Dr. Tanja Jovanović confirmed.]. Klinka. 23 December 2021. Retrieved 2 January 2022.

ekstrabladet.dk (Global: 3,663^rd place; English: 5,480^th place)

Ritzau A (28 November 2021). "Nu er det bekræftet: To personer smittet med Omikron rejst ind i Danmark" [Now it has been confirmed: Two people infected with Omicron traveled into Denmark]. ekstrabladet.dk (in Danish). Archived from the original on 28 November 2021. Retrieved 28 November 2021.

elpais.com (Global: 84^th place; English: 370^th place)

Guillén, Beatriz (3 December 2021). "México confirma el primer caso de ómicron en el país" [Mexico confirms the first omicron case in the country]. El País (in Spanish). Mexico. Retrieved 3 December 2021.

euronews.com (Global: 612^th place; English: 921^st place)

"Omicron in Europe: Where has the new COVID variant been detected?". euronews. 13 December 2021. Retrieved 20 December 2021.

europa.eu (Global: 68^th place; English: 117^th place)

ecdc.europa.eu

"Implications of the emergence and spread of the SARS-CoV-2 B.1.1.529 variant of concern (Omicron) for the EU/EEA" (PDF). ecdc.europa.eu. Archived (PDF) from the original on 26 November 2021. Retrieved 26 November 2021.
"Update on SARS-CoV-2 variants: ECDC assessment of the XBB.1.5 sub-lineage". European CDC. 9 January 2023. Archived from the original on 18 March 2023. Retrieved 12 January 2023.
"SARS-CoV-2 variants of concern as of 9 January 2023". European CDC. 9 January 2023. Archived from the original on 16 June 2021. Retrieved 12 January 2023.
"Epidemiological update: Omicron variant of concern (VOC) – data as of 16 December 2021 (12:00)". European Centre for Disease Prevention and Control. 16 December 2021. Retrieved 20 December 2021.
"Table 1. Confirmed cases of SARS-CoV-2 Omicron VOC reported by public sources, as of 10 December 2021 (12:00)". ecdc.europa.eu. European Centre for Disease Prevention and Control (ECDC). 10 December 2021. Retrieved 16 December 2021.
"Epidemiological update: Omicron variant of concern (VOC) – data as of 8 December 2021 (12.00)". ecdc.europa.eu. ECDC. 8 December 2021. Retrieved 9 December 2021.

ema.europa.eu

"Meeting highlights from the Committee for Medicinal Products for Human Use (CHMP) 14-17 October 2024". European Medicines Agency (EMA). 18 October 2024. Retrieved 21 October 2024. Text was copied from this source which is copyright European Medicines Agency. Reproduction is authorized provided the source is acknowledged.
"ETF recommends updating COVID-19 vaccines to target new LP.8.1 variant". European Medicines Agency (EMA) (Press release). 16 May 2025. Retrieved 16 May 2025.

express.co.uk (Global: 402^nd place; English: 279^th place)

Murrison P (18 January 2022). "Omicron symptoms: Three distinctive rashes to watch for". Express.co.uk. Archived from the original on 12 January 2022. Retrieved 30 January 2022.

facebook.com (Global: 77^th place; English: 111^th place)

"الناطق باسم وزارة الصحة د. كمال... - وزارة الصحة الفلسطينية - Facebook". Facebook. Retrieved 30 December 2021.
"Public Health National Emergency Operations Center, Sierra Leone". facebook.com. Retrieved 10 December 2021.

fbcnews.com.fj (Global: low place; English: low place)

"Two confirmed cases of Omicron variant in quarantine". Fiji Broadcasting Corporation. Archived from the original on 6 December 2021. Retrieved 6 December 2021.

fda.gov (Global: 447^th place; English: 338^th place)

"COVID-19 Vaccine Boosters". U.S. Food and Drug Administration (FDA). 27 September 2022. Archived from the original on 8 October 2022. Retrieved 8 October 2022.
"Moderna COVID-19 Vaccines". U.S. Food and Drug Administration (FDA). 7 October 2022. Archived from the original on 7 October 2022. Retrieved 8 October 2022.
"Pfizer-BioNTech COVID-19 Vaccines". U.S. Food and Drug Administration (FDA). 3 October 2022. Archived from the original on 8 October 2022. Retrieved 8 October 2022.
"Updated COVID-19 Vaccines for Use in the United States Beginning in Fall 2023". U.S. Food and Drug Administration (FDA). 15 June 2023. Archived from the original on 17 June 2023. Retrieved 16 June 2023. This article incorporates text from this source, which is in the public domain.
Recommendation for the 2023-2024 Formula of COVID-19 vaccines in the U.S. (PDF) (Report). U.S. Food and Drug Administration (FDA). 16 June 2023. Archived from the original on 16 June 2023. Retrieved 16 June 2023.
"Updated COVID-19 Vaccines for Use in the United States Beginning in Fall 2024". U.S. Food and Drug Administration (FDA). 5 June 2024. Archived from the original on 18 June 2024. Retrieved 19 June 2024. This article incorporates text from this source, which is in the public domain.
"SARS-CoV-2 Viral Mutations: Impact on COVID-19 Tests". FDA. 16 December 2021. Archived from the original on 21 December 2021. Retrieved 16 December 2021.

fhi.no (Global: low place; English: low place)

"Number of confirmed omicron cases as of 3 December". Folkehelseinstituttet. 4 December 2021. Archived from the original on 4 December 2021. Retrieved 4 December 2021.
"COVID-19 Ukerapport – uke 2" (PDF) (in Norwegian). Norwegian Institute of Public Health. 19 January 2022. Archived (PDF) from the original on 27 January 2022. Retrieved 25 January 2022.
Oppdatert, Publisert (12 August 2021). "Statistikk over meldte tilfeller av virusvarianten omikron". Folkehelseinstituttet (in Norwegian). Retrieved 22 December 2021.
Oppdatert P (8 December 2021). "Statistikk over meldte tilfeller av virusvarianten omikron" (in Norwegian). Folkehelseinstituttet. Archived from the original on 28 December 2021. Retrieved 29 December 2021.

focus.de (Global: 460^th place; English: 2,405^th place)

"Verbreitet sich rasant: Eine der "besorgniserregendsten Varianten": So gefährlich ist BQ.1.1". FOCUS online (in German). 20 October 2022. Archived from the original on 31 October 2022. Retrieved 31 October 2022.

focustaiwan.tw (Global: 3,164^th place; English: 2,032^nd place)

Chang, Ming-hsuan; Liu, Kay (1 January 2022). "Taiwan reports 21 new COVID-19 cases, confirms 2 Omicron infections". Central News Agency of the Republic of China. Focus Taiwan. Retrieved 2 January 2022.

folkhalsomyndigheten.se (Global: low place; English: low place)

"Statistik om SARS-CoV-2 virusvarianter av särskild betydelse — Folkhälsomyndigheten". Public Health Agency of Sweden (in Swedish). Retrieved 5 January 2022.

forbes.com (Global: 54^th place; English: 48^th place)

Johnson A. "What We Know About 'Eris' Covid Variant EG.5: The Dominant Strain Driving An Uptick In Cases". Forbes. Archived from the original on 23 August 2023. Retrieved 11 August 2023.

fortune.com (Global: 433^rd place; English: 284^th place)

McGregor G (21 January 2022). "What is 'stealth Omicron'? The rise of the subvariant is alarming some scientists who say it needs its own Greek letter". Fortune. Archived from the original on 23 January 2022. Retrieved 23 January 2022.
"Why Omicron-infected white-tailed deer pose an especially big risk to humans". Fortune. Archived from the original on 13 February 2022. Retrieved 13 February 2022.

fr.de (Global: 1,508^th place; English: 7,002^nd place)

Kesselgruber K (27 November 2021). "Flughafen Frankfurt: Person mit Omikron-Verdacht war vollständig geimpft" [Frankfurt airport: Person suspected to be infected with Omicron Variant was fully vaccinated]. Frankfurter Rundschau (in German). Archived from the original on 27 November 2021. Retrieved 27 November 2021.

france24.com (Global: 481^st place; English: 508^th place)

"Covid-19: Omicron is now the dominant variant in France". France24. 31 December 2021. Archived from the original on 3 January 2022. Retrieved 31 December 2021.

francetvinfo.fr (Global: 363^rd place; English: 1,663^rd place)

la1ere.francetvinfo.fr

"Covid-19: la circulation du variant Omicron désormais avérée en Guyane, une vingtaine de cas détectés" [Covid-19: the circulation of the Omicron variant now proven in Guyana, around twenty cases detected]. Guyane la 1ère (in French). 29 December 2021. Retrieved 7 January 2022.
"Covid-19: Un premier cas de variant Omicron confirmé à Mayotte" [Covid-19: First case of the Omicron variant confirmed in Mayotte]. Mayotte la 1ère (in French). 22 December 2021. Retrieved 7 January 2022.
"Covid-19: un premier cas de variant Omicron détecté en Martinique" [Covid-19: First case of the Omicron variant detected in Martinique]. Martinique la 1ère (in French). 24 December 2022. Retrieved 7 January 2022.

freepressjournal.in (Global: 1,265^th place; English: 679^th place)

"Germany: Leipzig reports first Omicron variant case with no travel history". Free Press Journal. Archived from the original on 1 December 2021. Retrieved 1 December 2021.

gambia.com (Global: low place; English: low place)

Ceesay, Landing (7 January 2022). "Covid-19 Update: Gambia Registers 26 Omicron Variant Cases". Gambia.com. Retrieved 7 January 2022.

gavi.org (Global: low place; English: low place)

"From Kraken to Pirola: who comes up with the nicknames for COVID-19 variants? | Gavi, the Vaccine Alliance". www.gavi.org. 9 October 2023. Retrieved 12 December 2023.
Geddes L (17 December 2021). "How do the symptoms of Omicron differ from previous COVID-19 variants?". GAVI. Archived from the original on 13 December 2022. Retrieved 13 December 2022.

geo.tv (Global: 2,505^th place; English: 1,370^th place)

"Coronavirus: Pakistan reports first case of Omicron variant". geo.tv. 9 December 2021. Retrieved 9 December 2021.

gisaid.org (Global: low place; English: low place)

"In focus". gisaid.org. GISAID. 28 November 2021. Archived from the original on 21 January 2021. Retrieved 28 November 2021. The unique mix of spike amino acid changes in Omicron GR/484A (B.1.1.529) is of interest as it comprises several that were previously known to affect receptor binding and antibody escape.
"Sequencing by country". GISAID. 2 December 2021. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Tracking of Variants". GISAID. Archived from the original on 23 June 2021. Retrieved 12 January 2022. Updated frequently.

gisbarbados.gov.bb (Global: low place; English: low place)

Rollock, Melissa (30 December 2021). "Chief Medical Officer: Omicron Is Here". GIS. Retrieved 2 January 2022.

github.com (Global: 383^rd place; English: 320^th place)

Wenseleers T (22 December 2021), tomwenseleers/newcovid_belgium, archived from the original on 22 December 2021, retrieved 22 December 2021
Wenseleers T (20 December 2021), tomwenseleers/newcovid_belgium, archived from the original on 22 December 2021, retrieved 21 December 2021

globally24.com (Global: low place; English: low place)

"Switzerland announces new restrictions for Israelis after the discovery of Omicron". Globally 24. Archived from the original on 27 November 2021. Retrieved 27 November 2021.

globalnews.ca (Global: 985^th place; English: 583^rd place)

"B.C. enacts social gathering and event capacity limits as Omicron variant spreads". Global News. Archived from the original on 19 December 2021. Retrieved 18 December 2021.

globo.com (Global: 62^nd place; English: 304^th place)

g1.globo.com

"SP confirma terceiro caso da variante ômicron" [SP confirms third case of ômicron variant]. g1 (in Brazilian Portuguese). 1 December 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.

extra.globo.com

"Ômicron: incidência já é de 31,7% em oito estados do Brasil, mostra levantamento inédito" (in Brazilian Portuguese). Editora Globo S/A. 29 December 2021. Retrieved 31 December 2021.

gmanetwork.com (Global: 824^th place; English: 488^th place)

"Philippines detects Omicron variant from 2 international travelers". GMA News. 15 December 2021. Retrieved 15 December 2021.
"Philippines detects 10 new Omicron cases, including 3 local". GMA News. 31 December 2021. Retrieved 2 January 2022.
"Philippines detects 492 new Omicron cases, total at 535". GMA News. 19 January 2022. Retrieved 24 January 2022.

go.com (Global: 48^th place; English: 39^th place)

abcnews.go.com

"Sputnik V maker: Vaccine could be adapted to fight omicron". ABC News. Moscow. Associated Press. 29 November 2021. Archived from the original on 2 December 2021. Retrieved 29 November 2021.
Rajeshuni, N (26 January 2022). "Scientists monitoring new omicron subvariant BA.2". ABC News. Archived from the original on 1 February 2022. Retrieved 2 February 2022.
"Omicron confirmed in nine African countries, say officials". ABC News. Archived from the original on 7 December 2021. Retrieved 7 December 2021.

gob.cu (Global: low place; English: low place)

salud.msp.gob.cu

MINSAP, Redacción (15 December 2021). "Nota informativa del Ministerio de Salud Pública" [Information note from the Ministry of Public Health]. Sitio oficial de gobierno del Ministerio de Salud Pública en Cuba (in European Spanish). Retrieved 20 December 2021.

gouv.ci (Global: low place; English: low place)

"Covid-19 Omicron: Des cas positifs de ce variant "plus transmissible mais moins virulent" enregistres en Côte d'Ivoire". gouv.ci. 4 January 2022. Retrieved 9 January 2022. ...on a eu 78 échantillons positifs pour le variant Omicron.

gov.hu (Global: 7,700^th place; English: low place)

koronavirus.gov.hu

"További 46 omikronos esetet azonosítottak". koronavirus.gov.hu (in Hungarian). 23 December 2021. Retrieved 24 December 2021.

gov.jm (Global: low place; English: low place)

jis.gov.jm

"Jamaica On Alert For Omicron Variant – Jamaica Information Service". jis.gov.jm. 22 December 2021. Retrieved 2 January 2022.

gov.ky (Global: low place; English: low place)

"COVID-19 Update - 24 December". gov.ky. Retrieved 26 December 2021.

gov.scot (Global: 7,387^th place; English: 4,467^th place)

"Omicron in Scotland – evidence paper". www.gov.scot. Archived from the original on 20 December 2021. Retrieved 11 December 2021.

gov.si (Global: 4,607^th place; English: 6,416^th place)

"First cases of the omicron variant of coronavirus confirmed in Slovenia". GOV.SI. 14 December 2021. Retrieved 15 December 2021.

gov.vc (Global: low place; English: low place)

"One Imported Omicron Case". gov.vc. 27 December 2021. Retrieved 2 January 2022.

gulfnews.com (Global: 765^th place; English: 523^rd place)

"COVID-19: Toddlers make up 10% of hospital cases in South Africa's Omicron epicentre". gulfnews.com. Archived from the original on 2 December 2021. Retrieved 2 December 2021.

handle.net (Global: 102^nd place; English: 76^th place)

hdl.handle.net

Planas D, Saunders N, Maes P, Guivel-Benhassine F, Planchais C, Buchrieser J, et al. (February 2022). "Considerable escape of SARS-CoV-2 Omicron to antibody neutralization". Nature. 602 (7898): 671–675. Bibcode:2022Natur.602..671P. doi:10.1038/s41586-021-04389-z. hdl:2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339121. PMID 35016199. S2CID 256823009.

harvard.edu (Global: 18^th place; English: 17^th place)

ui.adsabs.harvard.edu

Gowrisankar A, Priyanka TM, Banerjee S (10 January 2022). "Omicron: a mysterious variant of concern". European Physical Journal Plus. 137 (1): 100. Bibcode:2022EPJP..137..100G. doi:10.1140/epjp/s13360-021-02321-y. PMC 8743750. PMID 35036269.
Cao Y, Yisimayi A, Jian F, Song W, Xiao T, Wang L, et al. (June 2022). "BA.2.12.1, BA.4 and BA.5 escape antibodies elicited by Omicron infection". Nature. 608 (7923): 593–602. Bibcode:2022Natur.608..593C. doi:10.1038/s41586-022-04980-y. PMC 9385493. PMID 35714668.
Viana R, Moyo S, Amoako DG, Tegally H, Scheepers C, Althaus CL, et al. (March 2022). "Rapid epidemic expansion of the SARS-CoV-2 Omicron variant in southern Africa". Nature. 603 (7902): 679–686. Bibcode:2022Natur.603..679V. doi:10.1038/s41586-022-04411-y. PMC 8942855. PMID 35042229.
Planas D, Saunders N, Maes P, Guivel-Benhassine F, Planchais C, Buchrieser J, et al. (February 2022). "Considerable escape of SARS-CoV-2 Omicron to antibody neutralization". Nature. 602 (7898): 671–675. Bibcode:2022Natur.602..671P. doi:10.1038/s41586-021-04389-z. hdl:2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339121. PMID 35016199. S2CID 256823009.
Mallapaty S (6 December 2022). "Surprising Omicron origins study comes under scrutiny". Nature. 612 (7940): 387–388. Bibcode:2022Natur.612..387M. doi:10.1038/d41586-022-04357-1. PMID 36474049. S2CID 254402519.
Callaway E (December 2021). "Heavily mutated Omicron variant puts scientists on alert". Nature. 600 (7887): 21. Bibcode:2021Natur.600...21C. doi:10.1038/d41586-021-03552-w. PMID 34824381. S2CID 244660616.
Khandia R, Singhal S, Alqahtani T, Kamal MA, El-Shall NA, Nainu F, et al. (June 2022). "Emergence of SARS-CoV-2 Omicron (B.1.1.529) variant, salient features, high global health concerns and strategies to counter it amid ongoing COVID-19 pandemic". Environmental Research. 209 112816. Bibcode:2022ER....20912816K. doi:10.1016/j.envres.2022.112816. PMC 8798788. PMID 35093310.
Hong Q, Han W, Li J, Xu S, Wang Y, Xu C, et al. (April 2022). "Molecular basis of receptor binding and antibody neutralization of Omicron". Nature. 604 (7906): 546–552. Bibcode:2022Natur.604..546H. doi:10.1038/s41586-022-04581-9. PMID 35228716. S2CID 247167987.
Zhang L, Mann M, Syed ZA, Reynolds HM, Tian E, Samara NL, et al. (November 2021). "Furin cleavage of the SARS-CoV-2 spike is modulated by O-glycosylation". Proceedings of the National Academy of Sciences of the United States of America. 118 (47) e2109905118. Bibcode:2021PNAS..11809905Z. doi:10.1073/pnas.2109905118. PMC 8617502. PMID 34732583. S2CID 242937417.
Kudriaeva AA, Butenko IO, Saratov GA, Ri MT, Mokrushina YA, Bondarev AA, et al. (2025). "Mutational pressure promotes release of public CD8+ T cell epitopes by proteasome from SARS-CoV-2 RBD of Omicron and its current lineages". iScience. 28 (3). Bibcode:2025iSci...28k1873K. doi:10.1016/j.isci.2025.111873. PMC 11889684. PMID 40060909.
Cele S, Jackson L, Khoury DS, Khan K, Moyo-Gwete T, Tegally H, et al. (COMMIT-KZN Team) (February 2022). "Omicron extensively but incompletely escapes Pfizer BNT162b2 neutralization". Nature. 602 (7898): 654–656. Bibcode:2022Natur.602..654C. doi:10.1038/s41586-021-04387-1. PMC 8866126. PMID 35016196. S2CID 245879254.
Callaway E (December 2021). "Omicron likely to weaken COVID vaccine protection". Nature. 600 (7889): 367–368. Bibcode:2021Natur.600..367C. doi:10.1038/d41586-021-03672-3. PMID 34880488. S2CID 245007078.
Suryawanshi RK, Chen IP, Ma T, Syed AM, Brazer N, Saldhi P, et al. (May 2022). "Limited cross-variant immunity from SARS-CoV-2 Omicron without vaccination". Nature. 607 (7918): 351–355. Bibcode:2022Natur.607..351S. doi:10.1038/s41586-022-04865-0. PMC 9279157. PMID 35584773. S2CID 248890159.
Maxmen A (December 2021). "Omicron blindspots: why it's hard to track coronavirus variants". Nature. 600 (7890): 579. Bibcode:2021Natur.600..579M. doi:10.1038/d41586-021-03698-7. PMID 34916668. S2CID 245262198.

health.harvard.edu

Harvard Medical School (6 January 2022). "Coronavirus Resource Center – Harvard Health". Harvard Health Publishing. Archived from the original on 11 January 2022. Retrieved 7 January 2022. Lab studies, animal studies, and epidemiological data all indicate that Omicron may cause less severe disease than previous variants.

healio.com (Global: low place; English: low place)

"No increased autoimmune risk after omicron, delta COVID-19 in boosted patients". www.healio.com. Retrieved 25 October 2024.

health.govt.nz (Global: low place; English: low place)

"First Omicron case detected in New Zealand". Ministry of Healfh. 16 December 2021. Archived from the original on 20 December 2021. Retrieved 16 December 2021.
"MidCentral hits 90% fully vaccinated milestone; 69 community cases; 62 in hospital; 7 in ICU". Ministry of Health NZ. Retrieved 20 December 2021.

hhs.gov (Global: 5,973^rd place; English: 3,693^rd place)

aspr.hhs.gov

"March 25, 2022 | Important Update". aspr.hhs.gov. Archived from the original on 27 January 2023. Retrieved 6 April 2022.

hpsc.ie (Global: low place; English: low place)

"Summary of COVID-19 virus variants in Ireland – HPSC". HSE Health Protection Surveillance Centre (HPSC). 13 July 2022. p. 7. Retrieved 15 July 2022.

ijzcg.me (Global: low place; English: low place)

"Laboratorije Odjeljenja za molekularnu dijagnostiku potvrdile 5 slučajeva infekcije Omicron sojem". Institut za javno zdravlje Crne Gore. 16 December 2021. Retrieved 17 December 2021.

imperial.ac.uk (Global: 7,025^th place; English: 4,914^th place)

Ferguson N, Ghani A, Hinsley W, Volz E (22 December 2021). Hospitalisation risk for Omicron cases in England (Technical report). WHO Collaborating Centre for Infectious Disease Modelling, MRC Centre for Global Infectious Disease Analysis. Imperial College London. doi:10.25561/93035. Report 50. Archived (PDF) from the original on 23 December 2021.
"Some reduction in hospitalisation for Omicron v Delta in England: early analysis". Imperial College London. 22 December 2021. Archived from the original on 22 January 2022. Retrieved 22 January 2022.

in-24.com (Global: low place; English: low place)

news.in-24.com

"Schweiz sitrep". Twitter. 10 December 2021. Archived from the original on 12 December 2021. Retrieved 10 December 2021.

independent.co.uk (Global: 36^th place; English: 33^rd place)

"Omicron sub-variant BA.2 'under investigation' by UK health officials". The Independent. 23 January 2022. Archived from the original on 23 January 2022. Retrieved 23 January 2022.
"What is new Covid variant NB.1.8.1? Symptoms as cases confirmed in UK". The Independent. 6 June 2025. Retrieved 9 June 2025.
"First cases of Covid variant NB.1.8.1 detected in England as virus spreads across UK". The Independent. 6 June 2025. Retrieved 9 June 2025.

independent.ie (Global: 315^th place; English: 209^th place)

O'Regan E (13 May 2022). "Ireland and Europe at risk of new Covid surge as two new variants of concern declared". independent. Archived from the original on 22 August 2023. Retrieved 13 May 2022.

india.com (Global: 385^th place; English: 234^th place)

"Stealth Omicron: What is The Fast Spreading Omicron BA.2 Sub-Variant That Can Escape RT-PCR Test?". india.com. 23 January 2022. Archived from the original on 23 January 2022. Retrieved 23 January 2022.

indiatimes.com (Global: 17^th place; English: 15^th place)

timesofindia.indiatimes.com

Yengkhom S (11 January 2022). "BA.2 'stealth' variant makes up 80% of Kolkata's Omicron infections". The Times of India. Archived from the original on 16 January 2022. Retrieved 17 January 2022.
"New COVID variant NB.1.8.1 found in the UK: What are the symptoms?". The Times of India. 6 June 2025. ISSN 0971-8257. Retrieved 9 June 2025.

economictimes.indiatimes.com

"Sri Lanka reports first case of Omicron variant". The Economic Times. Retrieved 3 December 2021.
"Bhutan reports first cases of Omicron coronavirus variant". The Economic Times. Reuters. 14 January 2021. Retrieved 19 January 2022.

inews.co.uk (Global: 1,084^th place; English: 617^th place)

Bawden T (2 August 2022). "New Covid symptoms: Night sweats emerge as common sign of Omicron BA.5 with 1 in 10 suffering hot flushes". i. Archived from the original on 13 December 2022. Retrieved 13 December 2022.

inforpress.cv (Global: low place; English: low place)

"Covid 19: INSP confirma que 87% das amostras enviadas ao Instituto Pasteur revelaram presença da ómicron" [Covid 19: INSP confirms that 87% of samples sent to the Pasteur Institute revealed the presence of the omicron]. inforpress.cv. 4 January 2022. Retrieved 9 January 2022. Há menos de uma semana, foram enviadas para esse laboratório, cerca de trezentas amostras, das quais foram processadas 202 que confirmaram a presença da variante ómicron em 87% das amostras processadas", avançou a mesma fonte.

infostart.hu (Global: low place; English: low place)

"Müller Cecília: megjött Magyarországra az omikron variáns" [Cecília Müller: the omicron variant has arrived in Hungary]. Infostart. 13 December 2021. Retrieved 13 December 2021.

ins.gob.pe (Global: low place; English: low place)

web.ins.gob.pe

"Distribución de casos por las VOC delta - ómicron" [Distribution of cases by VOC Delta - Omicron]. National Institute of Health (Peru) [es] (in Spanish). 18 July 2022. Retrieved 31 July 2022.

isna.ir (Global: 422^nd place; English: 5,832^nd place)

"افزایش مبتلایان به اُمیکرون در کشور به ۴۶۷ مورد". ایسنا (in Persian). 7 January 2022. Retrieved 10 January 2022.

iss.it (Global: low place; English: low place)

"Covid-19: sulla piattaforma ICoGen 84 sequenze della variante Omicron" [Covid-19: 84 sequences of the Omicron variant on the ICoGen platform] (in Italian). 18 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.

journaldesfemmes.fr (Global: 6,569^th place; English: low place)

sante.journaldesfemmes.fr

"Variant Covid BA.5: majoritaire en France, quels symptômes?". sante.journaldesfemmes.fr (in French). Archived from the original on 9 July 2022. Retrieved 1 July 2022.

jpost.com (Global: 544^th place; English: 387^th place)

"Two Israeli doctors test positive for Omicron COVID variant". The Jerusalem Post. 30 November 2021. Archived from the original on 31 December 2021. Retrieved 30 November 2021.

jubaecho.com (Global: low place; English: low place)

"South Sudan confirms omicron variant in the country". Juba echo. 2 January 2022. Retrieved 9 January 2022.

karger.com (Global: 4,489^th place; English: 4,454^th place)

Cella E, Benedetti F, Fabris S, Borsetti A, Pezzuto A, Ciotti M, et al. (2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Archived from the original on 29 October 2023. Retrieved 1 December 2023.
Cella, Eleonora; Benedetti, Francesca; Fabris, Silvia; Borsetti, Alessandra; Pezzuto, Aldo; Ciotti, Marco; et al. (18 March 2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Retrieved 12 December 2023.

kathimerini.gr (Global: 2,366^th place; English: 5,819^th place)

"Όμικρον: 17 κρούσματα στην Ελλάδα | Η ΚΑΘΗΜΕΡΙΝΗ". www.kathimerini.gr. 16 December 2021. Retrieved 20 December 2021.

kibrispostasi.com (Global: low place; English: low place)

"'Omicron variant' detected in two people in TRNC!". Kıbrıs Postası. 21 December 2021. Retrieved 22 December 2021.

klix.ba (Global: 4,316^th place; English: 3,238^th place)

"Omikron stigao i u Bosnu i Hercegovinu, novi soj potvrđen kod 10 osoba" [Omicron has also arrived in Bosnia and Herzegovina, the new strain has been confirmed in 10 people]. klix.ba (in Croatian). 29 December 2021. Retrieved 2 January 2022.

kpadhne.com (Global: low place; English: low place)

Mukeshsingh (23 December 2022). "Covid-19 Variant BF.7 Symptoms, Precautions, Transmission". Kpadhne. Archived from the original on 30 December 2022. Retrieved 25 December 2022.

kqed.org (Global: 5,134^th place; English: 2,827^th place)

Stark K, Rodriguez JF, Dillon RM (1 December 2021). "First U.S. Case of Omicron Variant Found in San Francisco Resident". San Francisco: KQED. Archived from the original on 1 December 2021. Retrieved 1 December 2021.

kuna.net.kw (Global: 2,926^th place; English: 6,736^th place)

Coronavirus: Kuwait reports first case of Omicron variant 8 December 2021

laotiantimes.com (Global: low place; English: low place)

"Laos has detected first case of Covid-19 Omicron Variant". Laotiantimes.com. 7 January 2022. Retrieved 7 January 2022.

latercera.com (Global: 947^th place; English: 2,635^th place)

"Autoridad sanitaria informa 73 casos confirmados con variante Ómicron en Chile". La Tercera. 20 December 2021. Retrieved 21 December 2021.

lecourrier.vn (Global: low place; English: low place)

"Le Togo enregistre ses premiers cas du variant Omicron" [Togo records its first cases of the Omicron variant]. Le Courrier. Retrieved 2 January 2022. Au moins cinq cas du nouveau variant Omicron ont été identifiés au Togo. (At least five cases of the new Omicron variant have been identified in Togo).

lefigaro.fr (Global: 113^th place; English: 775^th place)

"Covid -19: premiers cas de variant Omicron détectés en Guadeloupe et à Saint-Martin". LEFIGARO (in French). 18 December 2021. Retrieved 9 January 2022. Un autre cas a été confirmé, à Saint-Martin, sur une personne en provenance du Canada, indique la même source. (Another case has been confirmed in Saint-Martin, on a person from Canada, indicating the same source.)

lematin.ma (Global: 5,833^rd place; English: low place)

Badri, Souad. "Omicron: 76 cas enregistrés au Maroc dont une personne admise en réanimation". Le Matin (in French). Retrieved 29 December 2021.

lemonde.fr (Global: 83^rd place; English: 603^rd place)

"A new Omicron variant, BQ.1.1, is spreading throughout France". Le Monde.fr. 25 October 2022. Archived from the original on 3 January 2023. Retrieved 20 November 2022.

leprogres.fr (Global: 2,878^th place; English: low place)

Carassio J (7 February 2022). "BA.1.1, un nouveau sous-variant d'Omicron déjà très répandu en France". Le Progrès. Archived from the original on 12 March 2022. Retrieved 12 March 2022.

libyaobserver.ly (Global: low place; English: low place)

"Libya reports first Omicron cases". The Libya Observer. 30 December 2021. Retrieved 2 January 2022.

lrt.lt (Global: 5,044^th place; English: 5,297^th place)

"Lithuania confirms two Omicron infections". Lithuanian National Radio and Television. 15 December 2021. Retrieved 15 December 2021.

lsm.lv (Global: 3,067^th place; English: 3,545^th place)

eng.lsm.lv

"Latvia gets its first two Omicron cases". Public Broadcasting of Latvia. Reuters. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 6 December 2021.

makfax.com.mk (Global: low place; English: low place)

Макфакс (5 January 2022). "Пораст на бројот на заразени од коронаворус, во Македонија активни 5.667 случаи" [Increase in the number of coronavirus infected, 5,667 active cases in Macedonia]. МАКФАКС (in Macedonian). Retrieved 9 January 2022. Во Македонија вчера беа детектирани девет случаи на омикрон, од кои 8 од Скопје и едно лице од Кочани. (Nine cases of Omicron were detected in Macedonia yesterday, of which 8 were from Skopje and one person from Kocani.)

malaysiakini.com (Global: 2,489^th place; English: 2,398^th place)

"Omicron sudah sampai ke Malaysia". Malaysiakini. 3 December 2021. Archived from the original on 3 December 2021. Retrieved 8 December 2021.

marketresearchtelecast.com (Global: low place; English: low place)

"Ómicron: the Ministry of Health confirmed the first case in Argentina". MRT. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 6 December 2021.

mcot.net (Global: 7,532^nd place; English: low place)

tna.mcot.net

"Country Has 5,397 Omicron Cases". สำนักข่าวไทย อสมท (in Thai). 10 January 2022. Retrieved 10 January 2022.

medicalnewstoday.com (Global: 3,011^th place; English: 2,709^th place)

"Does Omicron cause less damage to the lungs?". medicalnewstoday.com. 14 January 2022. Archived from the original on 9 February 2022. Retrieved 22 August 2023.

medpagetoday.com (Global: 9,274^th place; English: 5,856^th place)

Fiore K (18 October 2023). "What to Know About the HV.1 Variant". MedPage Today. Archived from the original on 21 February 2024. Retrieved 4 September 2024.

medriva.com (Global: low place; English: low place)

"BREAKING: ECDC upgrades Omicron Sublineages BA.4 and BA. 5 to Variants of Concern from Variants of Interest, making it the first public health authority". Medriva. 13 May 2022. Archived from the original on 14 May 2022. Retrieved 13 May 2022.

medrxiv.org (Global: low place; English: low place)

Al Jurdi A, Gassen RB, Borges TJ, Lape IT, Morena L, Efe O, et al. (June 2022). "Suboptimal antibody response against SARS-CoV-2 Omicron variant after third dose of mRNA vaccine in kidney transplant recipients". pp. 1282–1286. medRxiv 10.1101/2022.01.03.22268649v1.
Lyngse FP, Mortensen LH, Denwood MJ, Christiansen LE, Møller CH, Skov RL, et al. (27 December 2021). "SARS-CoV-2 Omicron VOC Transmission in Danish Households". medRxiv 10.1101/2021.12.27.21268278v1.
Wilhelm A, Widera M, Grikscheit K, Toptan T, Schenk B, Pallas C, et al. (8 December 2021). "Reduced Neutralization of SARS-CoV-2 Omicron Variant by Vaccine Sera and Monoclonal Antibodies". medRxiv 10.1101/2021.12.07.21267432.
Roessler A, Riepler L, Bante D, von Laer D, Kimpel J (11 December 2021). "SARS-CoV-2 B.1.1.529 variant (Omicron) evades neutralization by sera from vaccinated and convalescent individuals". medRxiv 10.1101/2021.12.08.21267491.
Khoury DS, Steain M, Triccas J, Sigal A, Davenport MP (17 December 2021). "A meta-analysis of Early Results to predict Vaccine efficacy against Omicron". medRxiv 10.1101/2021.12.13.21267748.
Garcia-Beltran WF, St Denis KJ, Hoelzemer A, Lam EC, Nitido AD, Sheehan ML, et al. (December 2021). "mRNA-based COVID-19 vaccine boosters induce neutralizing immunity against SARS-CoV-2 Omicron variant". medRxiv 10.1101/2021.12.14.21267755.
Doria-Rose NA, Shen X, Schmidt SD, O'Dell S, McDanal C, Feng W, et al. (December 2021). "Booster of mRNA-1273 Strengthens SARS-CoV-2 Omicron Neutralization". medRxiv 10.1101/2021.12.15.21267805v2.
Hansen CH, Schelde AB, Moustsen-Helms IR, Emborg HD, Krause TG, Mølbak K, et al. (Infectious Disease Preparedness Group at Statens Serum Institute) (23 December 2021). "Vaccine effectiveness against SARS-CoV-2 infection with the Omicron or Delta variants following a two-dose or booster BNT162b2 or mRNA-1273 vaccination series: A Danish cohort study". medRxiv 10.1101/2021.12.20.21267966.
Khan K, Karim F, Ganga Y, Bernstein M, Jule Z, Reedoy K, et al. (1 May 2022). "Omicron sub-lineages BA.4/BA.5 escape BA.1 infection elicited neutralizing immunity". medRxiv 10.1101/2022.04.29.22274477.
Lewnard JA, Hong VX, Patel MM, Kahn R, Lipsitch M, Tartof SY (11 January 2022). "Clinical outcomes among patients infected with Omicron (B.1.1.529) SARS-CoV-2 variant in southern California". medRxiv 10.1101/2022.01.11.22269045.
Pulliam JR, van Schalkwyk C, Govender N, von Gottberg A, Cohen C, Groome MJ, et al. (January 2021). "SARS-CoV-2 reinfection trends in South Africa: analysis of routine surveillance data". medRxiv 10.1101/2021.11.11.21266068.

medscape.com (Global: 719^th place; English: 636^th place)

O'Mary L (14 November 2022). "BQ.1 and BQ.1.1 Become New Dominant COVID Subvariants". Medscape. Archived from the original on 25 November 2022. Retrieved 16 November 2022.

metro.co.uk (Global: 296^th place; English: 217^th place)

Slater J (23 January 2022). "Is a change to your taste or smell a sign of Omicron?". Metro. Archived from the original on 26 January 2022. Retrieved 30 January 2022.

mhlw.go.jp (Global: 1,656^th place; English: low place)

"新型コロナウイルス感染症(変異株)の患者等の発生について(空港検疫))" (in Japanese). National Institute of Infectious Diseases (Japan). 20 January 2022. Archived from the original on 20 January 2022. Retrieved 24 January 2022.
"新型コロナウイルス感染症(変異株)の患者等の発生について(空港検疫)" (in Japanese). National Institute of Infectious Diseases (Japan). 24 January 2022. Archived from the original on 24 January 2022. Retrieved 24 January 2022.
"新型コロナウイルスゲノム解析による検疫の系統別検出状況（2022年７月27日時点）". www.mhlw.go.jp (in Japanese).

min-saude.pt (Global: low place; English: low place)

insa.min-saude.pt

"Monitorização das linhas vermelhas para a COVID-19" [Monitoring of red lines for COVID-19] (PDF). INSA (in Portuguese). National Health Service of Portugal. 3 December 2021. p. 14. Archived (PDF) from the original on 4 December 2021. Retrieved 7 December 2021.

minutouno.com (Global: 7,730^th place; English: low place)

"Hay más de 80 casos posibles de Ómicron en Argentina" [There are more than 80 possible cases of Ómicron in Argentina] (in Spanish). 13 December 2021. Retrieved 13 December 2021.

minzdrav.gov.by (Global: low place; English: low place)

"В Беларусь пришел новый вариант коронавируса – омикрон" [New variant of coronavirus arrives in Belarus - Omicron]. minzdrav.gov.by (in Russian). 29 December 2021. Retrieved 2 January 2022. Новый штамм выявлен у четырех минчан. (The new strain was identified in four residents of Minsk.)

mirror.co.uk (Global: 245^th place; English: 189^th place)

Padin M (17 January 2022). "Feeling light-headed may be an early indication you have Omicron Covid variant". Daily Mirror. Archived from the original on 28 January 2022. Retrieved 30 January 2022.

mmegi.bw (Global: low place; English: low place)

Tlhankane S (25 November 2021). "Four cases of the new COVID-19 variant recorded in Botswana". Mmegi Online. Archived from the original on 26 November 2021. Retrieved 4 September 2024.

moh.gov.sg (Global: low place; English: low place)

"MOH | News Highlights". www.moh.gov.sg. Retrieved 1 January 2022.

montsame.mn (Global: low place; English: low place)

"12 cases of Omicron variant confirmed in Mongolia". MONTSAME News Agency. 17 January 2022. Retrieved 19 January 2022.

moz.gov.ua (Global: low place; English: low place)

"В Україні виявили штам "Омікрон"" [Omicron strain found in Ukraine]. Ukrainian Ministry of Health (in Ukrainian). 18 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.

ms.ro (Global: low place; English: low place)

"Comunicate de presa" [Press Releases]. ms.ro (in Romanian). Ministerul Sănătăţii (Health Ministry Romania). 12 December 2021. Retrieved 13 December 2021. So far, 8 cases with the Omicron variant of the SARS-Cov-2 virus have been confirmed in Romania.

mskcc.org (Global: low place; English: 7,046^th place)

libguides.mskcc.org

Boyce L (12 April 2023). "LibGuides: SARS-CoV-2: SARS-CoV-2 Recombination". Memorial Sloan Kettering Cancer Center. Archived from the original on 15 June 2023. Retrieved 15 April 2023.

mspbs.gov.py (Global: low place; English: low place)

"Se confirman tres casos de Ómicron en viajeros provenientes de Cancún" [Three cases of Omicron confirmed in travellers from Cancun]. mspbs.gov. 27 December 2021. Retrieved 2 January 2022.

msu.edu (Global: 1,844^th place; English: 1,231^st place)

users.math.msu.edu

Wang R, Chen J, Wei GW (December 2021). "Mechanisms of SARS-CoV-2 Evolution Revealing Vaccine-Resistant Mutations in Europe and America" (PDF). The Journal of Physical Chemistry Letters. 12 (49): 11850–11857. doi:10.1021/acs.jpclett.1c03380. PMC 8672435. PMID 34873910. Archived (PDF) from the original on 18 December 2021. Retrieved 27 January 2022.

nacion.com (Global: 2,019^th place; English: 3,687^th place)

"Ministerio de Salud confirma presencia de variante ómicron en Bolivia". La Nación (in Spanish). 7 January 2022. Retrieved 9 January 2022.

nbcchicago.com (Global: 4,374^th place; English: 2,476^th place)

"Omicron Symptoms: Here's How They Differ From Other Variants". NBC Chicago. 7 January 2022. Archived from the original on 24 January 2022. Retrieved 30 January 2022.

nbcnews.com (Global: 137^th place; English: 101^st place)

"BA.2 version of omicron is now dominant coronavirus variant in U.S., CDC says". NBC News. Reuters. 29 March 2022. Archived from the original on 29 March 2022. Retrieved 30 March 2022.

nbcnewyork.com (Global: 3,191^st place; English: 1,829^th place)

Kennedy M, Price RD (26 November 2021). "'It's Coming': NY Declares State of Emergency Ahead of Potential Omicron Spike". NBC New York. Archived from the original on 26 November 2021. Retrieved 27 November 2021.

ncdc.gov.ng (Global: low place; English: low place)

Adetifa, Dr Ifedayo (7 December 2021). "Three Additional Cases of Omicron Variant Confirmed". ncdc.gov.ng. Nigeria Centre for Disease Control (NCDC). Retrieved 11 December 2021. In addition to the three cases announced earlier on 1st December 2021, this brings the total number of confirmed cases of the Omicron variant detected in Nigeria to six (6).

ndtv.com (Global: 138^th place; English: 95^th place)

"Omicron Variant May Cause Another Covid Wave: WHO Chief Scientist". NDTV.com. Archived from the original on 9 February 2023. Retrieved 21 October 2022.
"Highly Transmissible New Covid-19 Variant NB.1.8.1 Found In The UK; What Are The Symptoms?". www.ndtv.com. Retrieved 9 June 2025.
"Omicron Cases in India". NDTV. 17 January 2022. Retrieved 22 August 2023.

news-medical.net (Global: 8,069^th place; English: 7,681^st place)

Kunkalikar B (31 October 2022). "SARS-CoV-2 Omicron BA.2 less severe than Delta and original Omicron". News-Medical.net. Archived from the original on 6 November 2022. Retrieved 6 November 2022.
Rudman, Chelses (6 June 2025). "New COVID variant NB.1.8.1 spreads across continents amid calls for vigilance". News-Medical. Retrieved 9 June 2025.
"Study findings suggest spread of Omicron can be ascribed to immune evasiveness rather than an increase in transmissibility". News-Medical.net. 5 January 2022. Archived from the original on 21 January 2022. Retrieved 17 January 2022.

news.cn (Global: 1,956^th place; English: 4,757^th place)

news.cn

"Zambia reports more Omicron variant COVID-19 cases". Xinhuanet.com. 11 December 2021. Retrieved 13 December 2021.
"Cases of Omicron variant rise to 8 in Lebanon". news.cn. Retrieved 19 December 2021.
"Cambodia confirms 1st case of Omicron COVID-19 variant". Xinhua News Agency. 15 December 2021. Retrieved 15 December 2021.
"Malawi confirms 3 Omicron cases, issues strict traveling restrictions". news.cn. Retrieved 10 December 2021.

french.news.cn

"(COVID-19) La République du Congo enregistre une flambée des nouvelles contaminations (officiel)_French.news.cn" [(COVID-19) Republic of Congo records outbreak of new contamination (official)]. french.news.cn (in French). 5 January 2022. Retrieved 7 January 2022. ...confirmant également pour la première fois la circulation du variant Omicron en République du Congo (...also confirming for the first time the circulation of the Omicron variant in the Republic of Congo).

english.news.cn

"Tanzanian president confirms spreading of Omicron variant-Xinhua". english.news.cn. 1 January 2022. Retrieved 2 January 2022.

news.gov.hk (Global: low place; English: low place)

"HK reports 7 imported virus cases". Hong Kong's Information Services Department (in Chinese (Hong Kong)). Retrieved 24 December 2021.
"14 imported virus cases found". Hong Kong's Information Services Department (in Chinese (Hong Kong)). Retrieved 30 December 2021.

news24.com (Global: 1,309^th place; English: 762^nd place)

Cowan K (29 November 2021). "Inside SA leg of Omicron variant discovery: A single test result, a missing gene, and an email". News24. Archived from the original on 2 December 2021. Retrieved 2 December 2021.

news9live.com (Global: 9,748^th place; English: 5,299^th place)

"Portugal says Omicron dominant, infections rising". NewsNine. 25 December 2021. Archived from the original on 28 December 2021. Retrieved 28 December 2021.

newsday.co.tt (Global: low place; English: 6,398^th place)

Lindo, Paula (13 December 2021). "Health Ministry: Trinidad and Tobago's first omicron case breached travel protocols". Trinidad and Tobago Newsday. Retrieved 16 December 2021. TT's first recorded case of the omicron variant is an imported one.

newsnodes.com (Global: low place; English: low place)

"Newsnodes - Omicron tracker". newsnodes.com. Retrieved 24 December 2021.

newstalk.com (Global: low place; English: 8,332^nd place)

Quann J (7 July 2022). "Luke O'Neill: Night sweats now a sign of BA.5 COVID variant". Newstalk. Archived from the original on 20 July 2022. Retrieved 10 July 2022.

newsweek.com (Global: 269^th place; English: 201^st place)

McDade A (29 March 2022). "Omicron BA.2 sub-variant now dominant in U.S., CDC says". Newsweek. Retrieved 29 March 2022.

nicd.ac.za (Global: low place; English: low place)

nicd.ac.za

"SARS-CoV-2 Sequencing Update 14 January 2022" (PDF). Network for Genomic Surveillance in South Africa. 14 January 2022. Archived (PDF) from the original on 17 January 2022. Retrieved 17 January 2022.
"Latest confirmed cases of COVID-19 in South Africa (26 November 2021)". National Institute for Communicable Diseases. 26 November 2021. Archived from the original on 4 December 2021.
"Latest confirmed cases of COVID-19 in South Africa (3 December 2021)". National Institute for Communicable Diseases. 3 December 2021. Archived from the original on 4 December 2021.
"Proportion and number of clades by epiweek in South Africa, 2021" (PDF). Network for Genomic Surveillance in South Africa. National Institute for Communicable Diseases. 26 November 2021. Archived (PDF) from the original on 2 December 2021. Retrieved 2 December 2021.
McCarthy K, Rachida S, Yousif M, Ndlovu N, Iwu-Jaja C, Howard W, et al. "Wastewater-based epidemiology for SARS-CoV-2 in South Africa" (PDF). National Institute for Communicable Diseases. Archived (PDF) from the original on 9 November 2021. Retrieved 30 November 2021.

gis.nicd.ac.za

"Operations Dashboard for ArcGIS". NICD GIS Portal. 28 July 2021. Archived from the original on 8 September 2021. Retrieved 4 September 2024.

nih.gov (Global: 4^th place; English: 4^th place)

pubmed.ncbi.nlm.nih.gov

Poudel S, Ishak A, Perez-Fernandez J, Garcia E, León-Figueroa DA, Romaní L, et al. (December 2021). "Highly mutated SARS-CoV-2 Omicron variant sparks significant concern among global experts – What is known so far?". Travel Medicine and Infectious Disease. 45 102234. doi:10.1016/j.tmaid.2021.102234. PMC 8666662. PMID 34896326.
Quarleri J, Galvan V, Delpino MV (February 2022). "Omicron variant of the SARS-CoV-2: a quest to define the consequences of its high mutational load". GeroScience. 44 (1): 53–56. doi:10.1007/s11357-021-00500-4. PMC 8683309. PMID 34921354.
Gowrisankar A, Priyanka TM, Banerjee S (10 January 2022). "Omicron: a mysterious variant of concern". European Physical Journal Plus. 137 (1): 100. Bibcode:2022EPJP..137..100G. doi:10.1140/epjp/s13360-021-02321-y. PMC 8743750. PMID 35036269.
Vitiello A, Ferrara F, Auti AM, Di Domenico M, Boccellino M (July 2022). "Advances in the Omicron variant development". Journal of Internal Medicine. 292 (1): 81–90. doi:10.1111/joim.13478. PMC 9115048. PMID 35289434.
Yao L, Zhu KL, Jiang XL, Wang XJ, Zhan BD, Gao HX, et al. (June 2022). "Omicron subvariants escape antibodies elicited by vaccination and BA.2.2 infection". The Lancet. Infectious Diseases. 22 (8): 1116–1117. doi:10.1016/s1473-3099(22)00410-8. PMC 9212811. PMID 35738299.
Ahmed SF, Quadeer AA, McKay MR (January 2022). "SARS-CoV-2 T Cell Responses Elicited by COVID-19 Vaccines or Infection Are Expected to Remain Robust against Omicron". Viruses. 14 (1): 79. doi:10.3390/v14010079. PMC 8781795. PMID 35062283.
Altarawneh HN, Chemaitelly H, Ayoub HH, Tang P, Hasan MR, Yassine HM, et al. (July 2022). "Effects of Previous Infection and Vaccination on Symptomatic Omicron Infections". The New England Journal of Medicine. 387 (1): 21–34. doi:10.1056/NEJMoa2203965. PMC 9258753. PMID 35704396. S2CID 249677809.
Nemet I, Kliker L, Lustig Y, Zuckerman N, Erster O, Cohen C, et al. (February 2022). "Third BNT162b2 Vaccination Neutralization of SARS-CoV-2 Omicron Infection". The New England Journal of Medicine. 386 (5): 492–494. doi:10.1056/NEJMc2119358. PMC 8823651. PMID 34965337.
Cao Y, Yisimayi A, Jian F, Song W, Xiao T, Wang L, et al. (June 2022). "BA.2.12.1, BA.4 and BA.5 escape antibodies elicited by Omicron infection". Nature. 608 (7923): 593–602. Bibcode:2022Natur.608..593C. doi:10.1038/s41586-022-04980-y. PMC 9385493. PMID 35714668.
Hachmann NP, Miller J, Collier AY, Ventura JD, Yu J, Rowe M, et al. (July 2022). "Neutralization Escape by SARS-CoV-2 Omicron Subvariants BA.2.12.1, BA.4, and BA.5". The New England Journal of Medicine. 387 (1): 86–88. doi:10.1056/NEJMc2206576. PMC 9258748. PMID 35731894. S2CID 249956777.
Viana R, Moyo S, Amoako DG, Tegally H, Scheepers C, Althaus CL, et al. (March 2022). "Rapid epidemic expansion of the SARS-CoV-2 Omicron variant in southern Africa". Nature. 603 (7902): 679–686. Bibcode:2022Natur.603..679V. doi:10.1038/s41586-022-04411-y. PMC 8942855. PMID 35042229.
Dyer O (December 2021). "Covid-19: South Africa's surge in cases deepens alarm over omicron variant". BMJ. 375 n3013. doi:10.1136/bmj.n3013. PMID 34862184. S2CID 244842008.
Gu H, Krishnan P, Ng DY, Chang LD, Liu GY, Cheng SS, et al. (February 2022). "Probable Transmission of SARS-CoV-2 Omicron Variant in Quarantine Hotel, Hong Kong, China, November 2021". Emerging Infectious Diseases. 28 (2): 460–462. doi:10.3201/eid2802.212422. PMC 8798678. PMID 34860154.
Planas D, Saunders N, Maes P, Guivel-Benhassine F, Planchais C, Buchrieser J, et al. (February 2022). "Considerable escape of SARS-CoV-2 Omicron to antibody neutralization". Nature. 602 (7898): 671–675. Bibcode:2022Natur.602..671P. doi:10.1038/s41586-021-04389-z. hdl:2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339121. PMID 35016199. S2CID 256823009.
Saxena SK, Kumar S, Ansari S, Paweska JT, Maurya VK, Tripathi AK, et al. (May 2022). "Transmission dynamics and mutational prevalence of the novel Severe acute respiratory syndrome coronavirus-2 Omicron Variant of Concern". Journal of Medical Virology. 94 (5): 2160–2166. doi:10.1002/jmv.27611. PMC 9015611. PMID 35050521.
Wei C, Shan KJ, Wang W, Zhang S, Huan Q, Qian W (December 2021). "Evidence for a mouse origin of the SARS-CoV-2 Omicron variant". Journal of Genetics and Genomics = Yi Chuan Xue Bao. 48 (12): 1111–1121. doi:10.1016/j.jgg.2021.12.003. PMC 8702434. PMID 34954396.
Alkhatib M, Salpini R, Carioti L, Ambrosio FA, D'Anna S, Duca L, et al. (April 2022). Perez DR (ed.). "Update on SARS-CoV-2 Omicron Variant of Concern and Its Peculiar Mutational Profile". Microbiology Spectrum. 10 (2): e0273221. doi:10.1128/spectrum.02732-21. PMC 9045195. PMID 35352942.
Tarcsai KR, Corolciuc O, Tordai A, Ongrádi J (June 2022). "SARS-CoV-2 infection in HIV-infected patients: potential role in the high mutational load of the Omicron variant emerging in South Africa". GeroScience. 44 (5): 2337–2345. doi:10.1007/s11357-022-00603-6. PMC 9225796. PMID 35739343.
Zungu N, Mabaso M, Ramlagan S, Simbayi L, Moyo S, Shisana O, et al. (May 2022). "Is There Risk Compensation among HIV Infected Youth and Adults 15 Years and Older on Antiretroviral Treatment in South Africa? Findings from the 2017 National HIV Prevalence, Incidence, Behaviour and Communication Survey". International Journal of Environmental Research and Public Health. 19 (10): 6156. doi:10.3390/ijerph19106156. PMC 9141949. PMID 35627693.
Fischer C, Maponga TG, Yadouleton A, Abílio N, Aboce E, Adewumi P, et al. (December 2022). "RETRACTED: Gradual emergence followed by exponential spread of the SARS-CoV-2 Omicron variant in Africa". Science. 378 (6623) eadd8737. doi:10.1126/science.add8737. PMID 36454863. S2CID 254150265. (Retracted, see doi:10.1126/science.adg2821, PMID 36537892, Retraction Watch)
Mallapaty S (6 December 2022). "Surprising Omicron origins study comes under scrutiny". Nature. 612 (7940): 387–388. Bibcode:2022Natur.612..387M. doi:10.1038/d41586-022-04357-1. PMID 36474049. S2CID 254402519.
Callaway E (December 2021). "Heavily mutated Omicron variant puts scientists on alert". Nature. 600 (7887): 21. Bibcode:2021Natur.600...21C. doi:10.1038/d41586-021-03552-w. PMID 34824381. S2CID 244660616.
Vogel G (22 May 2022). "New versions of Omicron are masters of immune evasion". Science. 376 (6594): 679–680. doi:10.1126/science.adc9448. PMID 35549399. Archived from the original on 7 March 2023. Retrieved 20 November 2022.
Cella E, Benedetti F, Fabris S, Borsetti A, Pezzuto A, Ciotti M, et al. (2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Archived from the original on 29 October 2023. Retrieved 1 December 2023.
Khandia R, Singhal S, Alqahtani T, Kamal MA, El-Shall NA, Nainu F, et al. (June 2022). "Emergence of SARS-CoV-2 Omicron (B.1.1.529) variant, salient features, high global health concerns and strategies to counter it amid ongoing COVID-19 pandemic". Environmental Research. 209 112816. Bibcode:2022ER....20912816K. doi:10.1016/j.envres.2022.112816. PMC 8798788. PMID 35093310.
Hong Q, Han W, Li J, Xu S, Wang Y, Xu C, et al. (April 2022). "Molecular basis of receptor binding and antibody neutralization of Omicron". Nature. 604 (7906): 546–552. Bibcode:2022Natur.604..546H. doi:10.1038/s41586-022-04581-9. PMID 35228716. S2CID 247167987.
Mileto D, Micheli V, Fenizia C, Cutrera M, Gagliardi G, Mancon A, et al. (December 2022). "Reduced neutralization of SARS-CoV-2 Omicron variant by BNT162b2 vaccinees' sera: a preliminary evaluation". Emerging Microbes & Infections. 11 (1): 790–792. doi:10.1080/22221751.2022.2045878. PMC 8920392. PMID 35196967.
Zhang L, Mann M, Syed ZA, Reynolds HM, Tian E, Samara NL, et al. (November 2021). "Furin cleavage of the SARS-CoV-2 spike is modulated by O-glycosylation". Proceedings of the National Academy of Sciences of the United States of America. 118 (47) e2109905118. Bibcode:2021PNAS..11809905Z. doi:10.1073/pnas.2109905118. PMC 8617502. PMID 34732583. S2CID 242937417.
Walls AC, Park YJ, Tortorici MA, Wall A, McGuire AT, Veesler D (April 2020). "Structure, Function, and Antigenicity of the SARS-CoV-2 Spike Glycoprotein". Cell. 181 (2): 281–292.e6. doi:10.1016/j.cell.2020.02.058. PMC 7102599. PMID 32155444.
Kudriaeva AA, Butenko IO, Saratov GA, Ri MT, Mokrushina YA, Bondarev AA, et al. (2025). "Mutational pressure promotes release of public CD8+ T cell epitopes by proteasome from SARS-CoV-2 RBD of Omicron and its current lineages". iScience. 28 (3). Bibcode:2025iSci...28k1873K. doi:10.1016/j.isci.2025.111873. PMC 11889684. PMID 40060909.
Arora P, Zhang L, Rocha C, Sidarovich A, Kempf A, Schulz S, et al. (June 2022). "Comparable neutralisation evasion of SARS-CoV-2 omicron subvariants BA.1, BA.2, and BA.3". The Lancet. Infectious Diseases. 22 (6): 766–767. doi:10.1016/S1473-3099(22)00224-9. PMC 9005119. PMID 35427493.
Mohapatra RK, Kandi V, Sarangi AK, Verma S, Tuli HS, Chakraborty S, et al. (July 2022). "The recently emerged BA.4 and BA.5 lineages of Omicron and their global health concerns amid the ongoing wave of COVID-19 pandemic - Correspondence". International Journal of Surgery. 103 106698. doi:10.1016/j.ijsu.2022.106698. PMC 9176102. PMID 35690362.
Vauhkonen H, Nguyen PT, Kant R, Plyusnin I, Erdin M, Kurkela S, et al. (June 2022). "Introduction and Rapid Spread of SARS-CoV-2 Omicron Variant and Dynamics of BA.1 and BA.1.1 Sublineages, Finland, December 2021". Emerging Infectious Diseases. 28 (6): 1229–1232. doi:10.3201/eid2806.220515. PMC 9155872. PMID 35378057.
Rahimi F, Talebi Bezmin Abadi A (March 2022). "The Omicron subvariant BA.2: Birth of a new challenge during the COVID-19 pandemic". International Journal of Surgery. 99 106261. doi:10.1016/j.ijsu.2022.106261. PMC 8837492. PMID 35167986.
Yamasoba D, Kimura I, Nasser H, Morioka Y, Nao N, Ito J, et al. (9 June 2022). "Virological characteristics of the SARS-CoV-2 Omicron BA.2 spike". Cell. 185 (12): 2103–2115. bioRxiv 10.1101/2022.02.14.480335v1. doi:10.1016/j.cell.2022.04.035. PMC 9057982. PMID 35568035. S2CID 246905491.
Mohapatra RK, Kandi V, Tuli HS, Chakraborty C, Dhama K (August 2022). "The recombinant variants of SARS-CoV-2: Concerns continues amid COVID-19 pandemic". Journal of Medical Virology. 94 (8): 3506–3508. doi:10.1002/jmv.27780. PMC 9088633. PMID 35419806.
Del Rio C, Malani PN (June 2022). "COVID-19 in 2022-The Beginning of the End or the End of the Beginning?". JAMA. 327 (24): 2389–2390. doi:10.1001/jama.2022.9655. PMID 35622357. S2CID 249096741.
Sheward DJ, Kim C, Fischbach J, Sato K, Muschiol S, Ehling RA, et al. (November 2022). "Omicron sublineage BA.2.75.2 exhibits extensive escape from neutralising antibodies". The Lancet Infectious Diseases. 22 (11): 1538–1540. doi:10.1016/S1473-3099(22)00663-6. PMC 9560757. PMID 36244347.
Cella, Eleonora; Benedetti, Francesca; Fabris, Silvia; Borsetti, Alessandra; Pezzuto, Aldo; Ciotti, Marco; et al. (18 March 2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Retrieved 12 December 2023.
Scarpa F, Sanna D, Benvenuto D, Borsetti A, Azzena I, Casu M, et al. (3 December 2022). "Genetic and Structural Data on the SARS-CoV-2 Omicron BQ.1 Variant Reveal Its Low Potential for Epidemiological Expansion". International Journal of Molecular Sciences. 23 (23) 15264. doi:10.3390/ijms232315264. PMC 9739521. PMID 36499592.
Uriu K, Okumura K, Uwamino Y, Chen L, Tolentino JE, Asakura H, Nagashima M, Sadamasu K, Yoshimura K, Ito J, Sato K; Genotype to Phenotype Japan (G2P-Japan) Consortium (2025). "Virological characteristics of the SARS-CoV-2 NB.1.8.1 variant". The Lancet. Infectious Diseases. doi:10.1016/S1473-3099(25)00356-1. PMID 40489985.
Kaku, Yu; Okumura, Kaho; Kawakubo, Shusuke; Uriu, Keiya; Chen, Luo; Kosugi, Yusuke; et al. (1 December 2024). "Virological characteristics of the SARS-CoV-2 XEC variant". The Lancet. 24 (12): e736. doi:10.1016/S1473-3099(24)00731-X. ISSN 1473-3099. PMID 39521009. Retrieved 25 July 2025.
Guo, Caiwan; Yu, Yuanling; Liu, Jingyi; Jian, Fanchong; Yang, Sijie; Song, Weiliang; et al. (1 July 2025). "Antigenic and virological characteristics of SARS-CoV-2 variants BA.3.2, XFG, and NB.1.8.1". The Lancet. 25 (7): e374 – e377. doi:10.1016/S1473-3099(25)00308-1. ISSN 1473-3099. PMID 40484018. Retrieved 25 July 2025.
Wang R, Chen J, Wei GW (December 2021). "Mechanisms of SARS-CoV-2 Evolution Revealing Vaccine-Resistant Mutations in Europe and America" (PDF). The Journal of Physical Chemistry Letters. 12 (49): 11850–11857. doi:10.1021/acs.jpclett.1c03380. PMC 8672435. PMID 34873910. Archived (PDF) from the original on 18 December 2021. Retrieved 27 January 2022.
Cao Y, Wang J, Jian F, Xiao T, Song W, Yisimayi A, et al. (February 2022). "Omicron escapes the majority of existing SARS-CoV-2 neutralizing antibodies". Nature. 602 (7898): 657–663. doi:10.1038/d41586-021-03796-6. PMC 8866119. PMID 35016194. S2CID 245455422.
Liu L, Iketani S, Guo Y, Chan JF, Wang M, Liu L, et al. (February 2022). "Striking antibody evasion manifested by the Omicron variant of SARS-CoV-2". Nature. 602 (7898): 676–681. doi:10.1038/d41586-021-03826-3. PMID 35016198. S2CID 245462866.
Mohsin M, Mahmud S (May 2022). "Omicron SARS-CoV-2 variant of concern: A review on its transmissibility, immune evasion, reinfection, and severity". Medicine. 101 (19) e29165. doi:10.1097/MD.0000000000029165. PMC 9276130. PMID 35583528. S2CID 248858919.
Bobrovitz N, Ware H, Ma X, Li Z, Hosseini R, Cao C, et al. (May 2023). "Protective effectiveness of previous SARS-CoV-2 infection and hybrid immunity against the omicron variant and severe disease: a systematic review and meta-regression". The Lancet Infectious Diseases. 23 (5): 556–567. doi:10.1016/S1473-3099(22)00801-5. PMC 10014083. PMID 36681084.
Zhou H, Møhlenberg M, Thakor JC, Tuli HS, Wang P, Assaraf YG, et al. (September 2022). "Sensitivity to Vaccines, Therapeutic Antibodies, and Viral Entry Inhibitors and Advances To Counter the SARS-CoV-2 Omicron Variant". Clinical Microbiology Reviews. 35 (3) e00014–22. doi:10.1128/cmr.00014-22. PMC 9491202. PMID 35862736.
Cele S, Jackson L, Khoury DS, Khan K, Moyo-Gwete T, Tegally H, et al. (COMMIT-KZN Team) (February 2022). "Omicron extensively but incompletely escapes Pfizer BNT162b2 neutralization". Nature. 602 (7898): 654–656. Bibcode:2022Natur.602..654C. doi:10.1038/s41586-021-04387-1. PMC 8866126. PMID 35016196. S2CID 245879254.
Callaway E (December 2021). "Omicron likely to weaken COVID vaccine protection". Nature. 600 (7889): 367–368. Bibcode:2021Natur.600..367C. doi:10.1038/d41586-021-03672-3. PMID 34880488. S2CID 245007078.
Arbel R, Hammerman A, Sergienko R, Friger M, Peretz A, Netzer D, et al. (December 2021). "BNT162b2 Vaccine Booster and Mortality Due to Covid-19". The New England Journal of Medicine. 385 (26): 2413–2420. doi:10.1056/NEJMoa2115624. PMC 8728797. PMID 34879190.
Bar-On YM, Goldberg Y, Mandel M, Bodenheimer O, Freedman L, Alroy-Preis S, et al. (December 2021). "Protection against Covid-19 by BNT162b2 Booster across Age Groups". The New England Journal of Medicine. 385 (26): 2421–2430. doi:10.1056/NEJMoa2115926. PMC 8728796. PMID 34879188.
Wee LE, Lim JT, Tay AT, Chiew CJ, Ong B, Lye DC, et al. (30 August 2024). "Autoimmune Sequelae After Delta or Omicron Variant SARS-CoV-2 Infection in a Highly Vaccinated Cohort". JAMA Network Open. 7 (8) e2430983. doi:10.1001/jamanetworkopen.2024.30983. ISSN 2574-3805. PMC 11364997. PMID 39212988.
Suryawanshi RK, Chen IP, Ma T, Syed AM, Brazer N, Saldhi P, et al. (May 2022). "Limited cross-variant immunity from SARS-CoV-2 Omicron without vaccination". Nature. 607 (7918): 351–355. Bibcode:2022Natur.607..351S. doi:10.1038/s41586-022-04865-0. PMC 9279157. PMID 35584773. S2CID 248890159.
Shin DH, Smith DM, Choi JY (2022). "SARS-CoV-2 Omicron Variant of Concern: Everything You Wanted to Know about Omicron but Were Afraid to Ask". Yonsei Medical Journal. 63 (11): 977–983. doi:10.3349/ymj.2022.0383. PMC 9629902. PMID 36303305.
CDC COVID-19 Response Team (December 2021). "SARS-CoV-2 B.1.1.529 (Omicron) Variant - United States, December 1-8, 2021". MMWR. Morbidity and Mortality Weekly Report. 70 (50). Center for Disease Control: 1731–1734. doi:10.15585/mmwr.mm7050e1. PMC 8675659. PMID 34914670. S2CID 245071514. Archived from the original on 20 December 2021. Retrieved 17 December 2021.
Antonelli M, Pujol JC, Spector TD, Ourselin S, Steves CJ (June 2022). "Risk of long COVID associated with delta versus omicron variants of SARS-CoV-2". The Lancet. 399 (10343): 2263–2264. doi:10.1016/S0140-6736(22)00941-2. ISSN 0140-6736. PMC 9212672. PMID 35717982.
Gordon AC, Mouncey PR, Al-Beidh F, Rowan KM, Nichol AD, Arabi YM, et al. (April 2021). "Interleukin-6 Receptor Antagonists in Critically Ill Patients with Covid-19". The New England Journal of Medicine. 384 (16): 1491–1502. doi:10.1056/NEJMoa2100433. PMC 7953461. PMID 33631065.
Cameroni E, Saliba C, Bowen JE, Rosen LE, Culap K, Pinto D, et al. (December 2021). "Broadly neutralizing antibodies overcome SARS-CoV-2 Omicron antigenic shift". bioRxiv. 602 (7898). doi:10.1038/d41586-021-03825-4. PMC 8687478. PMID 34931194.
Cao Y, Wang J, Jian F, Xiao T, Song W, Yisimayi A, et al. (February 2022). "Omicron escapes the majority of existing SARS-CoV-2 neutralizing antibodies". Nature. 602 (7898): 657–663. doi:10.1038/d41586-021-03796-6. PMC 8866119. PMID 35016194. S2CID 245455422.
Maxmen A (December 2021). "Omicron blindspots: why it's hard to track coronavirus variants". Nature. 600 (7890): 579. Bibcode:2021Natur.600..579M. doi:10.1038/d41586-021-03698-7. PMID 34916668. S2CID 245262198.

ncbi.nlm.nih.gov

Poudel S, Ishak A, Perez-Fernandez J, Garcia E, León-Figueroa DA, Romaní L, et al. (December 2021). "Highly mutated SARS-CoV-2 Omicron variant sparks significant concern among global experts – What is known so far?". Travel Medicine and Infectious Disease. 45 102234. doi:10.1016/j.tmaid.2021.102234. PMC 8666662. PMID 34896326.
Quarleri J, Galvan V, Delpino MV (February 2022). "Omicron variant of the SARS-CoV-2: a quest to define the consequences of its high mutational load". GeroScience. 44 (1): 53–56. doi:10.1007/s11357-021-00500-4. PMC 8683309. PMID 34921354.
Gowrisankar A, Priyanka TM, Banerjee S (10 January 2022). "Omicron: a mysterious variant of concern". European Physical Journal Plus. 137 (1): 100. Bibcode:2022EPJP..137..100G. doi:10.1140/epjp/s13360-021-02321-y. PMC 8743750. PMID 35036269.
Vitiello A, Ferrara F, Auti AM, Di Domenico M, Boccellino M (July 2022). "Advances in the Omicron variant development". Journal of Internal Medicine. 292 (1): 81–90. doi:10.1111/joim.13478. PMC 9115048. PMID 35289434.
Yao L, Zhu KL, Jiang XL, Wang XJ, Zhan BD, Gao HX, et al. (June 2022). "Omicron subvariants escape antibodies elicited by vaccination and BA.2.2 infection". The Lancet. Infectious Diseases. 22 (8): 1116–1117. doi:10.1016/s1473-3099(22)00410-8. PMC 9212811. PMID 35738299.
Ahmed SF, Quadeer AA, McKay MR (January 2022). "SARS-CoV-2 T Cell Responses Elicited by COVID-19 Vaccines or Infection Are Expected to Remain Robust against Omicron". Viruses. 14 (1): 79. doi:10.3390/v14010079. PMC 8781795. PMID 35062283.
Altarawneh HN, Chemaitelly H, Ayoub HH, Tang P, Hasan MR, Yassine HM, et al. (July 2022). "Effects of Previous Infection and Vaccination on Symptomatic Omicron Infections". The New England Journal of Medicine. 387 (1): 21–34. doi:10.1056/NEJMoa2203965. PMC 9258753. PMID 35704396. S2CID 249677809.
Nemet I, Kliker L, Lustig Y, Zuckerman N, Erster O, Cohen C, et al. (February 2022). "Third BNT162b2 Vaccination Neutralization of SARS-CoV-2 Omicron Infection". The New England Journal of Medicine. 386 (5): 492–494. doi:10.1056/NEJMc2119358. PMC 8823651. PMID 34965337.
Cao Y, Yisimayi A, Jian F, Song W, Xiao T, Wang L, et al. (June 2022). "BA.2.12.1, BA.4 and BA.5 escape antibodies elicited by Omicron infection". Nature. 608 (7923): 593–602. Bibcode:2022Natur.608..593C. doi:10.1038/s41586-022-04980-y. PMC 9385493. PMID 35714668.
Hachmann NP, Miller J, Collier AY, Ventura JD, Yu J, Rowe M, et al. (July 2022). "Neutralization Escape by SARS-CoV-2 Omicron Subvariants BA.2.12.1, BA.4, and BA.5". The New England Journal of Medicine. 387 (1): 86–88. doi:10.1056/NEJMc2206576. PMC 9258748. PMID 35731894. S2CID 249956777.
Viana R, Moyo S, Amoako DG, Tegally H, Scheepers C, Althaus CL, et al. (March 2022). "Rapid epidemic expansion of the SARS-CoV-2 Omicron variant in southern Africa". Nature. 603 (7902): 679–686. Bibcode:2022Natur.603..679V. doi:10.1038/s41586-022-04411-y. PMC 8942855. PMID 35042229.
Gu H, Krishnan P, Ng DY, Chang LD, Liu GY, Cheng SS, et al. (February 2022). "Probable Transmission of SARS-CoV-2 Omicron Variant in Quarantine Hotel, Hong Kong, China, November 2021". Emerging Infectious Diseases. 28 (2): 460–462. doi:10.3201/eid2802.212422. PMC 8798678. PMID 34860154.
Saxena SK, Kumar S, Ansari S, Paweska JT, Maurya VK, Tripathi AK, et al. (May 2022). "Transmission dynamics and mutational prevalence of the novel Severe acute respiratory syndrome coronavirus-2 Omicron Variant of Concern". Journal of Medical Virology. 94 (5): 2160–2166. doi:10.1002/jmv.27611. PMC 9015611. PMID 35050521.
Wei C, Shan KJ, Wang W, Zhang S, Huan Q, Qian W (December 2021). "Evidence for a mouse origin of the SARS-CoV-2 Omicron variant". Journal of Genetics and Genomics = Yi Chuan Xue Bao. 48 (12): 1111–1121. doi:10.1016/j.jgg.2021.12.003. PMC 8702434. PMID 34954396.
Alkhatib M, Salpini R, Carioti L, Ambrosio FA, D'Anna S, Duca L, et al. (April 2022). Perez DR (ed.). "Update on SARS-CoV-2 Omicron Variant of Concern and Its Peculiar Mutational Profile". Microbiology Spectrum. 10 (2): e0273221. doi:10.1128/spectrum.02732-21. PMC 9045195. PMID 35352942.
Tarcsai KR, Corolciuc O, Tordai A, Ongrádi J (June 2022). "SARS-CoV-2 infection in HIV-infected patients: potential role in the high mutational load of the Omicron variant emerging in South Africa". GeroScience. 44 (5): 2337–2345. doi:10.1007/s11357-022-00603-6. PMC 9225796. PMID 35739343.
Zungu N, Mabaso M, Ramlagan S, Simbayi L, Moyo S, Shisana O, et al. (May 2022). "Is There Risk Compensation among HIV Infected Youth and Adults 15 Years and Older on Antiretroviral Treatment in South Africa? Findings from the 2017 National HIV Prevalence, Incidence, Behaviour and Communication Survey". International Journal of Environmental Research and Public Health. 19 (10): 6156. doi:10.3390/ijerph19106156. PMC 9141949. PMID 35627693.
Cella E, Benedetti F, Fabris S, Borsetti A, Pezzuto A, Ciotti M, et al. (2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Archived from the original on 29 October 2023. Retrieved 1 December 2023.
Khandia R, Singhal S, Alqahtani T, Kamal MA, El-Shall NA, Nainu F, et al. (June 2022). "Emergence of SARS-CoV-2 Omicron (B.1.1.529) variant, salient features, high global health concerns and strategies to counter it amid ongoing COVID-19 pandemic". Environmental Research. 209 112816. Bibcode:2022ER....20912816K. doi:10.1016/j.envres.2022.112816. PMC 8798788. PMID 35093310.
Mileto D, Micheli V, Fenizia C, Cutrera M, Gagliardi G, Mancon A, et al. (December 2022). "Reduced neutralization of SARS-CoV-2 Omicron variant by BNT162b2 vaccinees' sera: a preliminary evaluation". Emerging Microbes & Infections. 11 (1): 790–792. doi:10.1080/22221751.2022.2045878. PMC 8920392. PMID 35196967.
Zhang L, Mann M, Syed ZA, Reynolds HM, Tian E, Samara NL, et al. (November 2021). "Furin cleavage of the SARS-CoV-2 spike is modulated by O-glycosylation". Proceedings of the National Academy of Sciences of the United States of America. 118 (47) e2109905118. Bibcode:2021PNAS..11809905Z. doi:10.1073/pnas.2109905118. PMC 8617502. PMID 34732583. S2CID 242937417.
Walls AC, Park YJ, Tortorici MA, Wall A, McGuire AT, Veesler D (April 2020). "Structure, Function, and Antigenicity of the SARS-CoV-2 Spike Glycoprotein". Cell. 181 (2): 281–292.e6. doi:10.1016/j.cell.2020.02.058. PMC 7102599. PMID 32155444.
Kudriaeva AA, Butenko IO, Saratov GA, Ri MT, Mokrushina YA, Bondarev AA, et al. (2025). "Mutational pressure promotes release of public CD8+ T cell epitopes by proteasome from SARS-CoV-2 RBD of Omicron and its current lineages". iScience. 28 (3). Bibcode:2025iSci...28k1873K. doi:10.1016/j.isci.2025.111873. PMC 11889684. PMID 40060909.
Arora P, Zhang L, Rocha C, Sidarovich A, Kempf A, Schulz S, et al. (June 2022). "Comparable neutralisation evasion of SARS-CoV-2 omicron subvariants BA.1, BA.2, and BA.3". The Lancet. Infectious Diseases. 22 (6): 766–767. doi:10.1016/S1473-3099(22)00224-9. PMC 9005119. PMID 35427493.
Mohapatra RK, Kandi V, Sarangi AK, Verma S, Tuli HS, Chakraborty S, et al. (July 2022). "The recently emerged BA.4 and BA.5 lineages of Omicron and their global health concerns amid the ongoing wave of COVID-19 pandemic - Correspondence". International Journal of Surgery. 103 106698. doi:10.1016/j.ijsu.2022.106698. PMC 9176102. PMID 35690362.
Vauhkonen H, Nguyen PT, Kant R, Plyusnin I, Erdin M, Kurkela S, et al. (June 2022). "Introduction and Rapid Spread of SARS-CoV-2 Omicron Variant and Dynamics of BA.1 and BA.1.1 Sublineages, Finland, December 2021". Emerging Infectious Diseases. 28 (6): 1229–1232. doi:10.3201/eid2806.220515. PMC 9155872. PMID 35378057.
Rahimi F, Talebi Bezmin Abadi A (March 2022). "The Omicron subvariant BA.2: Birth of a new challenge during the COVID-19 pandemic". International Journal of Surgery. 99 106261. doi:10.1016/j.ijsu.2022.106261. PMC 8837492. PMID 35167986.
Yamasoba D, Kimura I, Nasser H, Morioka Y, Nao N, Ito J, et al. (9 June 2022). "Virological characteristics of the SARS-CoV-2 Omicron BA.2 spike". Cell. 185 (12): 2103–2115. bioRxiv 10.1101/2022.02.14.480335v1. doi:10.1016/j.cell.2022.04.035. PMC 9057982. PMID 35568035. S2CID 246905491.
Mohapatra RK, Kandi V, Tuli HS, Chakraborty C, Dhama K (August 2022). "The recombinant variants of SARS-CoV-2: Concerns continues amid COVID-19 pandemic". Journal of Medical Virology. 94 (8): 3506–3508. doi:10.1002/jmv.27780. PMC 9088633. PMID 35419806.
Sheward DJ, Kim C, Fischbach J, Sato K, Muschiol S, Ehling RA, et al. (November 2022). "Omicron sublineage BA.2.75.2 exhibits extensive escape from neutralising antibodies". The Lancet Infectious Diseases. 22 (11): 1538–1540. doi:10.1016/S1473-3099(22)00663-6. PMC 9560757. PMID 36244347.
Cella, Eleonora; Benedetti, Francesca; Fabris, Silvia; Borsetti, Alessandra; Pezzuto, Aldo; Ciotti, Marco; et al. (18 March 2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Retrieved 12 December 2023.
Scarpa F, Sanna D, Benvenuto D, Borsetti A, Azzena I, Casu M, et al. (3 December 2022). "Genetic and Structural Data on the SARS-CoV-2 Omicron BQ.1 Variant Reveal Its Low Potential for Epidemiological Expansion". International Journal of Molecular Sciences. 23 (23) 15264. doi:10.3390/ijms232315264. PMC 9739521. PMID 36499592.
Wang R, Chen J, Wei GW (December 2021). "Mechanisms of SARS-CoV-2 Evolution Revealing Vaccine-Resistant Mutations in Europe and America" (PDF). The Journal of Physical Chemistry Letters. 12 (49): 11850–11857. doi:10.1021/acs.jpclett.1c03380. PMC 8672435. PMID 34873910. Archived (PDF) from the original on 18 December 2021. Retrieved 27 January 2022.
Cao Y, Wang J, Jian F, Xiao T, Song W, Yisimayi A, et al. (February 2022). "Omicron escapes the majority of existing SARS-CoV-2 neutralizing antibodies". Nature. 602 (7898): 657–663. doi:10.1038/d41586-021-03796-6. PMC 8866119. PMID 35016194. S2CID 245455422.
Mohsin M, Mahmud S (May 2022). "Omicron SARS-CoV-2 variant of concern: A review on its transmissibility, immune evasion, reinfection, and severity". Medicine. 101 (19) e29165. doi:10.1097/MD.0000000000029165. PMC 9276130. PMID 35583528. S2CID 248858919.
Bobrovitz N, Ware H, Ma X, Li Z, Hosseini R, Cao C, et al. (May 2023). "Protective effectiveness of previous SARS-CoV-2 infection and hybrid immunity against the omicron variant and severe disease: a systematic review and meta-regression". The Lancet Infectious Diseases. 23 (5): 556–567. doi:10.1016/S1473-3099(22)00801-5. PMC 10014083. PMID 36681084.
Zhou H, Møhlenberg M, Thakor JC, Tuli HS, Wang P, Assaraf YG, et al. (September 2022). "Sensitivity to Vaccines, Therapeutic Antibodies, and Viral Entry Inhibitors and Advances To Counter the SARS-CoV-2 Omicron Variant". Clinical Microbiology Reviews. 35 (3) e00014–22. doi:10.1128/cmr.00014-22. PMC 9491202. PMID 35862736.
Cele S, Jackson L, Khoury DS, Khan K, Moyo-Gwete T, Tegally H, et al. (COMMIT-KZN Team) (February 2022). "Omicron extensively but incompletely escapes Pfizer BNT162b2 neutralization". Nature. 602 (7898): 654–656. Bibcode:2022Natur.602..654C. doi:10.1038/s41586-021-04387-1. PMC 8866126. PMID 35016196. S2CID 245879254.
Arbel R, Hammerman A, Sergienko R, Friger M, Peretz A, Netzer D, et al. (December 2021). "BNT162b2 Vaccine Booster and Mortality Due to Covid-19". The New England Journal of Medicine. 385 (26): 2413–2420. doi:10.1056/NEJMoa2115624. PMC 8728797. PMID 34879190.
Bar-On YM, Goldberg Y, Mandel M, Bodenheimer O, Freedman L, Alroy-Preis S, et al. (December 2021). "Protection against Covid-19 by BNT162b2 Booster across Age Groups". The New England Journal of Medicine. 385 (26): 2421–2430. doi:10.1056/NEJMoa2115926. PMC 8728796. PMID 34879188.
Wee LE, Lim JT, Tay AT, Chiew CJ, Ong B, Lye DC, et al. (30 August 2024). "Autoimmune Sequelae After Delta or Omicron Variant SARS-CoV-2 Infection in a Highly Vaccinated Cohort". JAMA Network Open. 7 (8) e2430983. doi:10.1001/jamanetworkopen.2024.30983. ISSN 2574-3805. PMC 11364997. PMID 39212988.
Suryawanshi RK, Chen IP, Ma T, Syed AM, Brazer N, Saldhi P, et al. (May 2022). "Limited cross-variant immunity from SARS-CoV-2 Omicron without vaccination". Nature. 607 (7918): 351–355. Bibcode:2022Natur.607..351S. doi:10.1038/s41586-022-04865-0. PMC 9279157. PMID 35584773. S2CID 248890159.
Shin DH, Smith DM, Choi JY (2022). "SARS-CoV-2 Omicron Variant of Concern: Everything You Wanted to Know about Omicron but Were Afraid to Ask". Yonsei Medical Journal. 63 (11): 977–983. doi:10.3349/ymj.2022.0383. PMC 9629902. PMID 36303305.
CDC COVID-19 Response Team (December 2021). "SARS-CoV-2 B.1.1.529 (Omicron) Variant - United States, December 1-8, 2021". MMWR. Morbidity and Mortality Weekly Report. 70 (50). Center for Disease Control: 1731–1734. doi:10.15585/mmwr.mm7050e1. PMC 8675659. PMID 34914670. S2CID 245071514. Archived from the original on 20 December 2021. Retrieved 17 December 2021.
Antonelli M, Pujol JC, Spector TD, Ourselin S, Steves CJ (June 2022). "Risk of long COVID associated with delta versus omicron variants of SARS-CoV-2". The Lancet. 399 (10343): 2263–2264. doi:10.1016/S0140-6736(22)00941-2. ISSN 0140-6736. PMC 9212672. PMID 35717982.
Gordon AC, Mouncey PR, Al-Beidh F, Rowan KM, Nichol AD, Arabi YM, et al. (April 2021). "Interleukin-6 Receptor Antagonists in Critically Ill Patients with Covid-19". The New England Journal of Medicine. 384 (16): 1491–1502. doi:10.1056/NEJMoa2100433. PMC 7953461. PMID 33631065.
Cameroni E, Saliba C, Bowen JE, Rosen LE, Culap K, Pinto D, et al. (December 2021). "Broadly neutralizing antibodies overcome SARS-CoV-2 Omicron antigenic shift". bioRxiv. 602 (7898). doi:10.1038/d41586-021-03825-4. PMC 8687478. PMID 34931194.
Cao Y, Wang J, Jian F, Xiao T, Song W, Yisimayi A, et al. (February 2022). "Omicron escapes the majority of existing SARS-CoV-2 neutralizing antibodies". Nature. 602 (7898): 657–663. doi:10.1038/d41586-021-03796-6. PMC 8866119. PMID 35016194. S2CID 245455422.

niid.go.jp (Global: low place; English: low place)

"SARS-CoV-2の変異株B.1.1.529系統(オミクロン株)について(第6報)" (in Japanese). National Institute of Infectious Diseases (Japan). 14 January 2022. Archived from the original on 20 January 2022. Retrieved 24 January 2022.

npr.org (Global: 92^nd place; English: 72^nd place)

"The mystery of where omicron came from — and why it matters". NPR. 1 December 2021. Archived from the original on 9 December 2021. Retrieved 8 December 2021.
Huang P (20 November 2022). "How monoclonal antibodies lost the fight with new COVID variants". NPR. Archived from the original on 15 August 2023. Retrieved 15 August 2023.

nymag.com (Global: 346^th place; English: 229^th place)

Danner C (21 October 2022). "What We Know About the New and Rising COVID Variants". Intelligencer. Vox Media, LLC. nymag.com. Archived from the original on 1 November 2022. Retrieved 1 November 2022.

nypost.com (Global: 208^th place; English: 156^th place)

"Omicron variant found in UK, Germany, Czech Republic". New York Post. 28 November 2021. Archived from the original on 27 November 2021. Retrieved 28 November 2021.

nytimes.com (Global: 7^th place; English: 7^th place)

Patel V (27 November 2021). "How Omicron, the New Covid-19 Variant, Got Its Name". The New York Times. ISSN 0362-4331. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Dahir A, Ezeamalu B, Pérez-Peña R (1 December 2021). "Ghana and Nigeria are the latest African countries to detect the Omicron variant". The New York Times. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
Hassan A (28 June 2022). "The Omicron subvariants BA.4 and BA.5 have together become dominant in the U.S., the C.D.C. estimates". The New York Times. ISSN 0362-4331. Archived from the original on 29 June 2022. Retrieved 28 June 2022.
David Leonhardt (5 January 2022). "Omicron Is Milder". The New York Times. Archived from the original on 6 January 2022. Retrieved 7 January 2022. A few weeks ago, many experts and journalists were warning that the initial evidence from South Africa — suggesting that Omicron was milder than other variants — might turn out to be a mirage. It has turned out to be real.
Zimmer C, Lyons, PJ (24 February 2022). "Is the BA.2 version of Omicron worse? Here's what you need to know". The New York Times. Archived from the original on 12 March 2022. Retrieved 12 March 2022.
Mandavilli A (4 December 2021). "Omicron Variant Spreading Twice as Quickly as Delta in South Africa". The New York Times. ISSN 0362-4331. Archived from the original on 4 December 2021. Retrieved 4 December 2021.

ourworldindata.org (Global: 2,263^rd place; English: 1,687^th place)

"SARS-CoV-2 sequences by variant". Our World in Data. Archived from the original on 1 May 2022. Retrieved 30 June 2022.

outbreak.info (Global: low place; English: low place)

Karthik Gangavarapu; Alaa Abdel Latif; Julia Mullen; Manar Alkuzweny; Emory Hufbauer; Ginger Tsueng; et al. (18 August 2022). "Lineage Comparison". Outbreak.info. Archived from the original on 24 June 2021. Retrieved 24 August 2022.
Karthik Gangavarapu; Alaa Abdel Latif; Julia Mullen; Manar Alkuzweny; Emory Hufbauer; Ginger Tsueng; et al. (19 August 2022). "Omicron Variant Report". Outbreak.info. Archived from the original on 20 August 2022. Retrieved 24 August 2022.
"BA.2 Lineage Report, India". outbreak.info (Scripps Research). 4 February 2022. Archived from the original on 5 February 2022. Retrieved 5 February 2022.
"BA.2 Lineage Report". outbreak.info (Scripps Research). 21 January 2022. Archived from the original on 13 December 2021. Retrieved 21 January 2022.
"BA.1.1 Lineage Report, United States, France and Japan". outbreak.info (Scripps Research). 12 March 2022. Archived from the original on 14 March 2022. Retrieved 12 March 2022.
"BA.5.2.1 Lineage Report". Outbreak.info. Archived from the original on 13 July 2022. Retrieved 29 July 2022.
"Delta Variant Report". outbreak.info (Scripps Research). 13 December 2021. Archived from the original on 19 December 2021. Retrieved 13 December 2021.
"BA.1 Lineage Report". outbreak.info (Scripps Research). 19 December 2021. Archived from the original on 16 December 2021. Retrieved 19 December 2021.
"outbreak.info". outbreak.info. Retrieved 23 August 2022.

outbreakindia.com (Global: low place; English: low place)

"INDIA WE WILL FIGHT IT TOGETHER". COVID19 India. Archived from the original on 28 December 2021. Retrieved 30 December 2021.

pagina12.com.ar (Global: 952^nd place; English: 3,291^st place)

"Covid-19 en la Antártida: Ómicron se propagó en la Base Esperanza y evacuaron a 9 personas" [Covid-19 in Antarctica: Omicron has spread at the Esperanza Base and 9 people were evacuated]. Página12. 22 January 2022. Retrieved 28 January 2022. La variante Ómicron de coronavirus llegó a la Antártida, donde se detectaron 24 casos de covid-19 en la Base Esperanza...

paradisefm.cw (Global: low place; English: low place)

"Omikron-variant officieel op Curaçao" [Omicron variant officially in Curacao]. Paradise FM. 24 December 2021. Retrieved 2 January 2022.

pei.de (Global: low place; English: low place)

"STATEMENT MANY RAPID TESTS DETECT OMICRON" (PDF). PEI. 17 August 2022. Archived (PDF) from the original on 16 August 2022. Retrieved 16 August 2022.

petra.gov.jo (Global: low place; English: low place)

الأردنية (بترا), وكالة الأنباء. "تسجيل 30 إصابة جديدة بمتحور أوميكرون في المملكة". بترا -وكالة الأنباء الأردنية. Retrieved 5 January 2022.

pfizer.com (Global: low place; English: low place)

"Pfizer And BioNTech Provide Update On Omicron Variant" (Press release). New York City and Mainz: Pfizer. 8 December 2021. Archived from the original on 21 December 2021. Retrieved 8 December 2021.

politico.cd (Global: low place; English: low place)

"COVID-19: Dr Muyembe révèle que le variant Omicron représente 29% soit 11% d'écart avec le variant Delta en RDC" [COVID-19: Dr Muyembe reveals that the Omicron variant represents 29% or 11% difference from the Delta variant in the DRC]. Politico.cd (in French). 15 December 2021. Retrieved 2 January 2022.

publichealthontario.ca (Global: low place; English: low place)

"SARS-CoV-2 Genomic Surveillance in Ontario, July 22, 2022" (PDF). Public Health Ontario. Archived (PDF) from the original on 19 July 2021. Retrieved 29 July 2022.

publico.pt (Global: 1,394^th place; English: 2,715^th place)

"Portugal tem 38 casos da variante ómicron. Cuidados intensivos com "tendência fortemente crescente"" [Portugal has 38 cases of the omicron variant. Intensive care shows "strongly increasing trend"]. Público. 3 December 2021. Archived from the original on 4 December 2021. Retrieved 4 December 2021.

publishing.service.gov.uk (Global: 1,877^th place; English: 1,129^th place)

assets.publishing.service.gov.uk

"SARS-CoV-2 variants of concern and variants under investigation in England" (PDF). Archived from the original (PDF) on 5 November 2023.
"SARS-CoV-2 variants of concern and variants under investigation in England – Technical briefing 29" (PDF). gov.uk. UK Health Security Agency. 26 November 2021. p. 18. Archived (PDF) from the original on 27 November 2021. Retrieved 10 December 2021.
SARS-CoV-2 variants of concern and variants under investigation in England, technical briefing 31 (PDF) (Briefing). Public Health England. 10 December 2021. pp. 3–5, 20–22. GOV-10645. Archived (PDF) from the original on 18 December 2021. Retrieved 10 December 2021.
"COVID-19 vaccine surveillance report Week 4" (PDF). UK Health Security Agency. 27 January 2022. Archived (PDF) from the original on 27 January 2022. Retrieved 27 January 2022.
"SARS-CoV-2 variants of concern and variants under investigation in England" (PDF). Archived (PDF) from the original on 18 December 2021. Retrieved 10 December 2021.
"Risk assessment for SARS-CoV-2 variant: Omicron VOC-21NOV-01 (B.1.1.529): 3 December 2021" (PDF). GOV.UK. Archived (PDF) from the original on 4 December 2021. Retrieved 25 May 2025.
"SARS-CoV-2 variants of concern and variants under investigation in England – Technical briefing 33" (PDF). gov.uk. UK Health Security Agency. 23 December 2021. Archived (PDF) from the original on 2 January 2022. Retrieved 15 January 2022.
"SARS-CoV-2 variants of concern and variants under investigation in England, Technical briefing 38" (PDF). assets.publishing.service.gov.uk. Retrieved 3 January 2022.
"UK Health Security Agency Omicron daily overview: 31 December 2021" (PDF).

qna.org.qa (Global: low place; English: low place)

news.qna.org.qa

"MOPH Confirms Detection of Four Cases of Omicron COVID-19 Variant in Qatar". news.qna.org.qa. 17 December 2021. Retrieved 2 January 2022.

rappler.com (Global: 874^th place; English: 511^th place)

Magsambol, Bonz (20 December 2021). "Philippines detects one more case of Omicron, total now at 3". Rappler. Retrieved 22 December 2021.

regeneron.com (Global: low place; English: low place)

covid19dashboard.regeneron.com

"Regeneron COVID-19 Dashboard". Regeneron. Archived from the original on 30 July 2022. Retrieved 29 July 2022.

reliefweb.int (Global: 2,136^th place; English: 1,442^nd place)

"COVID-19 Weekly Epidemiological Update (Edition 156 published 17 August 2023)" (PDF). World Health Organization. 17 August 2023. Retrieved 30 August 2023.

retractionwatch.com (Global: low place; English: low place)

Fischer C, Maponga TG, Yadouleton A, Abílio N, Aboce E, Adewumi P, et al. (December 2022). "RETRACTED: Gradual emergence followed by exponential spread of the SARS-CoV-2 Omicron variant in Africa". Science. 378 (6623) eadd8737. doi:10.1126/science.add8737. PMID 36454863. S2CID 254150265. (Retracted, see doi:10.1126/science.adg2821, PMID 36537892, Retraction Watch)

reunion.gouv.fr (Global: low place; English: low place)

"Covid-19 à La Réunion: identification d'un 2ème cas positif au variant « Omicron »" [Covid-19 in Reunion Island: identification of a 2nd positive case for the "Omicron" variant]. reunion.gouv.fr (in French). Les services de l'État à La Réunion. 3 December 2021. Retrieved 9 December 2021.

reuters.com (Global: 49^th place; English: 47^th place)

"UK, Germany and Italy detect Omicron coronavirus variant cases". Reuters. 27 November 2021. Archived from the original on 27 November 2021. Retrieved 27 November 2021.
"61 travellers from South Africa in Netherlands positive for COVID-19 – authorities". Reuters. Amsterdam. 27 November 2021. Archived from the original on 26 November 2021. Retrieved 27 November 2021.
"Spain detects first Omicron case, COVID-19 infections rise". Reuters. 29 November 2021. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
"Japan's first Omicron case may help portray PM Kishida as decisive". Reuters. 30 November 2021. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
"Nigeria confirms first cases of Omicron among travellers from South Africa". Reuters. 1 December 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"South Korea reports five Omicron cases on flight from Nigeria". Reuters. 1 December 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"Dutch say 14 air passengers from S. Africa with Omicron were vaccinated". Reuters. 2 December 2021. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"France now has 25 Omicron Covid variant cases – minister". Reuters. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 7 December 2021.
"Namibia detects Omicron coronavirus variant in 18 of 19 samples". Reuters. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 7 December 2021.
"Africa accounts for 46% of reported cases of Omicron, WHO official says". Reuters. 9 December 2021. Archived from the original on 10 December 2021. Retrieved 9 December 2021.
"U.S. CDC estimates Omicron variant to be 58.6% of cases, revises projection". Reuters. 28 December 2021. Archived from the original on 6 March 2022. Retrieved 15 April 2022.
"S.Korea reports first deaths linked to Omicron coronavirus variant – Yonhap". Reuters. 3 January 2022. Archived from the original on 3 January 2022. Retrieved 3 January 2022.
"Novavax developing vaccine that targets new COVID-19 variant". CBS Baltimore Staff. 30 November 2021. Archived from the original on 2 December 2021. Retrieved 4 December 2021.
"WHO cautions against imposing travel restrictions due to new variant". Reuters. Geneva. 26 November 2021. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
Nebehay S, Winning A (26 November 2021). "WHO names new COVID variant omicron, cautions against travel measures". Reuters. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
"Omicron poses very high global risk, world must prepare -WHO". Reuters. Geneva. 29 November 2021. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
Winning A, Cocks T (26 November 2021). "South Africa says travel bans over new variant unjustified". Reuters. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
"EXCLUSIVE South Africa delays COVID vaccine deliveries as inoculations slow". Reuters. 24 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Meijer BH, van den Berg S (18 December 2021). "Netherlands to go into strict Christmas lockdown". Reuters. Archived from the original on 2 January 2022. Retrieved 2 January 2022.
"As Omicron threatens a global surge, some countries shorten COVID-19 booster timelines". Reuters. 20 December 2022. Archived from the original on 15 January 2022. Retrieved 15 January 2022.
Winning A, Shirbon E (10 February 2022). "Omicron BA.2 sub-variant dominant in S.Africa, says CDC". Reuters. Archived from the original on 12 March 2022. Retrieved 12 March 2022.
"Omicron sub-variants BA.4, BA.5 make up more than 50% of U.S. COVID cases - CDC". Reuters. 28 June 2022. Archived from the original on 28 June 2022. Retrieved 28 June 2022.
"Shanghai identifies new COVID Omicron subvariant". Reuters. 10 July 2022. Archived from the original on 30 July 2022. Retrieved 29 July 2022.
"Omicron survives longer on plastic, skin than prior variants; nose swabbing found best for rapid tests". Reuters. 24 January 2022. Archived from the original on 28 January 2022. Retrieved 28 January 2022.
"Zimbabwe says country has identified 50 cases of Omicron". Reuters. Johannesburg. 3 December 2021. Archived from the original on 3 December 2021. Retrieved 3 December 2021.
"Namibia detects Omicron coronavirus variant in 18 of 19 samples". Reuters. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 7 December 2021.
"Senegal records first Omicron case in tourist who attended demonstration". Reuters. 5 December 2021. Archived from the original on 5 December 2021. Retrieved 5 December 2021.
"Kosovo reports first cases of COVID-19 Omicron". Reuters. Pristina. 26 December 2021. Retrieved 28 December 2021. Kosovo's health ministry said on Sunday it had registered its first nine cases of the Omicron coronavirus variant in the Balkan country.
"Nepal detects first two cases of Omicron variant – health ministry". Reuters. 6 December 2021. Retrieved 6 December 2021.
Mukherjee, Promit; Hunnicutt, Trevor (1 December 2021). "Omicron rapidly dominating in South Africa; U.S. reports first case". Reuters. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Panama detects first case of COVID-19 Omicron variant". Reuters. 20 December 2021. Retrieved 21 December 2021.
Sequera, Vivian (23 December 2021). "Venezuela's Maduro says seven Omicron cases detected". Reuters. Retrieved 7 January 2022.
Rasheed, Ahmed (6 January 2022). "Iraq reports first cases of Omicron variant". Reuters. Retrieved 9 January 2022. Iraq has identified more than five cases of the Omicron coronavirus variant...

rfi.fr (Global: 559^th place; English: 1,777^th place)

"Gabon: le variant Omicron représente de 20 à 25% des personnes contrôlées positives au Covid-19". RFI (in French). 6 January 2022. Retrieved 9 January 2022.

rivm.nl (Global: low place; English: low place)

"Coronavirus variant Omicron found in 13 positive tests so far | RIVM". www.rivm.nl. Archived from the original on 6 December 2021. Retrieved 6 December 2021.
"Actuele informatie over COVID-19 | RIVM" [Current information about COVID-19 | RIVM]. www.rivm.nl (in Dutch). 4 December 2021. Archived from the original on 6 April 2020. Retrieved 6 December 2021.
"Omicron variant found in two previous test samples | RIVM". www.rivm.nl. Archived from the original on 4 December 2021. Retrieved 6 December 2021.
"Variants of the coronavirus SARS-CoV-2 in the Netherlands". National Institute for Public Health and the Environment. Archived from the original on 11 January 2022. Retrieved 14 January 2022.
"Omikronvariant B.1.1.529". National Institute for Public Health and the Environment. Retrieved 15 December 2021.

rki.de (Global: 4,845^th place; English: low place)

"Wöchentlicher Lagebericht des RKI zur Coronavirus-Krankheit-2019 (COVID-19)" (PDF). Robert Koch Institute. 10 March 2022. Archived (PDF) from the original on 12 March 2022. Retrieved 12 March 2022.
"RKI - Coronavirus SARS-CoV-2 - Wochenbericht vom 23.6.2022" (PDF). www.rki.de. Archived (PDF) from the original on 23 June 2022. Retrieved 25 June 2022.
"RKI – Coronavirus SARS-CoV-2 – Wochenbericht vom 13.1.2022" (PDF). www.rki.de. Archived (PDF) from the original on 24 January 2022. Retrieved 13 January 2022.
"Wochenberichte zu COVID-19" (in German). Robert Koch Institute. 16 December 2021. Retrieved 19 December 2021.

rnz.co.nz (Global: 2,219^th place; English: 1,274^th place)

"Fijians test positive for Omicron variant – Govt". RNZ. 7 December 2021. Archived from the original on 6 December 2021. Retrieved 8 December 2021.

royalgazette.com (Global: 7,956^th place; English: 4,492^nd place)

Bell, Jonathan (21 December 2021). "Omicron cases surge from one to more than 100 in two weeks". www.royalgazette.com. Retrieved 24 December 2021.
Bell, Jonathan (24 December 2021). "Two in hospital as Bermuda passes 6,000 Covid-19 cases". www.royalgazette.com. Retrieved 26 December 2021.

rte.ie (Global: 491^st place; English: 318^th place)

O'Donnell D (1 December 2021). "Case of Omicron variant confirmed in Ireland". RTÉ News and Current Affairs. Archived from the original on 3 December 2021. Retrieved 12 December 2021.

ruv.is (Global: 6,176^th place; English: 4,330^th place)

"Kári spáir omíkron-bylgju í janúar". ruv.is (in Icelandic). 18 December 2021. Retrieved 19 December 2021.

saechsische.de (Global: 6,870^th place; English: low place)

"Omikron-Subtyp BA.5 herrscht jetzt in Deutschland vor". www.saechsische.de (in German). 24 June 2022. Archived from the original on 24 June 2022. Retrieved 24 June 2022.

salon.com (Global: 456^th place; English: 300^th place)

Rozsa M, Karlis N (28 January 2022). "Omicron variant of COVID-19 may be the most contagious virus to ever exist". Salon. Archived from the original on 28 January 2022. Retrieved 30 January 2022.

salud.gob.ec (Global: low place; English: low place)

"Ecuador confirma primer caso de Ómicron". Ministerio de Salud Pública. 14 December 2021. Retrieved 15 December 2021.

santepubliquefrance.fr (Global: low place; English: low place)

SPF. "COVID-19: point épidémiologique du 30 juin 2022". www.santepubliquefrance.fr (in French). Archived from the original on 10 July 2022. Retrieved 1 July 2022.
sante publique france. "COVID-19: epidemiological update. Weekly report. Week 45. 17 November 2022" (in French). Archived from the original on 28 November 2022. Retrieved 20 November 2022.
"Coronavirus: chiffres clés et évolution de la COVID-19 en France et dans le Monde". www.santepubliquefrance.fr (in French). Retrieved 19 December 2021.

science.org (Global: 1,160^th place; English: 737^th place)

"'We made a mistake.' Omicron origin study retracted after widespread criticism". science.org. 20 December 2022. Archived from the original on 24 December 2022. Retrieved 24 December 2022. But Kristian Andersen [...] says the gradual evolution theory was already "off the table" before the paper was published.
Vogel G (22 May 2022). "New versions of Omicron are masters of immune evasion". Science. 376 (6594): 679–680. doi:10.1126/science.adc9448. PMID 35549399. Archived from the original on 7 March 2023. Retrieved 20 November 2022.
"'Patience is crucial': Why we won't know for weeks how dangerous Omicron is". www.science.org. Archived from the original on 30 November 2021. Retrieved 30 November 2021.

sciencedirect.com (Global: 149^th place; English: 178^th place)

Guo, Caiwan; Yu, Yuanling; Liu, Jingyi; Jian, Fanchong; Yang, Sijie; Song, Weiliang; et al. (2025). "Antigenic and virological characteristics of SARS-CoV-2 variants BA.3.2, XFG, and NB.1.8.1". The Lancet Infectious Diseases. 25 (7): e374 – e377. doi:10.1016/S1473-3099(25)00308-1.

sciencesetavenir.fr (Global: 5,021^st place; English: low place)

"Variant BA.5: après le Portugal, les autres pays européens". Sciences et Avenir (in French). 25 May 2022. Archived from the original on 26 May 2022. Retrieved 25 May 2022.

scmp.com (Global: 362^nd place; English: 245^th place)

"Sinovac and world's Covid-19 vaccine makers 'ready' to produce Omicron jab". South China Morning Post. 29 November 2021. Archived from the original on 30 November 2021. Retrieved 29 November 2021.
"Guangzhou reports China's second case of Omicron variant". South China Morning Post. 14 December 2021. Retrieved 17 December 2021.

see.news (Global: low place; English: low place)

"First 8 Omicron Cases Detected in Kazakhstan". see.news. 6 January 2022. Retrieved 10 January 2022.

semanticscholar.org (Global: 11^th place; English: 8^th place)

api.semanticscholar.org

Altarawneh HN, Chemaitelly H, Ayoub HH, Tang P, Hasan MR, Yassine HM, et al. (July 2022). "Effects of Previous Infection and Vaccination on Symptomatic Omicron Infections". The New England Journal of Medicine. 387 (1): 21–34. doi:10.1056/NEJMoa2203965. PMC 9258753. PMID 35704396. S2CID 249677809.
Hachmann NP, Miller J, Collier AY, Ventura JD, Yu J, Rowe M, et al. (July 2022). "Neutralization Escape by SARS-CoV-2 Omicron Subvariants BA.2.12.1, BA.4, and BA.5". The New England Journal of Medicine. 387 (1): 86–88. doi:10.1056/NEJMc2206576. PMC 9258748. PMID 35731894. S2CID 249956777.
Dyer O (December 2021). "Covid-19: South Africa's surge in cases deepens alarm over omicron variant". BMJ. 375 n3013. doi:10.1136/bmj.n3013. PMID 34862184. S2CID 244842008.
Planas D, Saunders N, Maes P, Guivel-Benhassine F, Planchais C, Buchrieser J, et al. (February 2022). "Considerable escape of SARS-CoV-2 Omicron to antibody neutralization". Nature. 602 (7898): 671–675. Bibcode:2022Natur.602..671P. doi:10.1038/s41586-021-04389-z. hdl:2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339121. PMID 35016199. S2CID 256823009.
Fischer C, Maponga TG, Yadouleton A, Abílio N, Aboce E, Adewumi P, et al. (December 2022). "RETRACTED: Gradual emergence followed by exponential spread of the SARS-CoV-2 Omicron variant in Africa". Science. 378 (6623) eadd8737. doi:10.1126/science.add8737. PMID 36454863. S2CID 254150265. (Retracted, see doi:10.1126/science.adg2821, PMID 36537892, Retraction Watch)
Mallapaty S (6 December 2022). "Surprising Omicron origins study comes under scrutiny". Nature. 612 (7940): 387–388. Bibcode:2022Natur.612..387M. doi:10.1038/d41586-022-04357-1. PMID 36474049. S2CID 254402519.
Callaway E (December 2021). "Heavily mutated Omicron variant puts scientists on alert". Nature. 600 (7887): 21. Bibcode:2021Natur.600...21C. doi:10.1038/d41586-021-03552-w. PMID 34824381. S2CID 244660616.
Hong Q, Han W, Li J, Xu S, Wang Y, Xu C, et al. (April 2022). "Molecular basis of receptor binding and antibody neutralization of Omicron". Nature. 604 (7906): 546–552. Bibcode:2022Natur.604..546H. doi:10.1038/s41586-022-04581-9. PMID 35228716. S2CID 247167987.
Zhang L, Mann M, Syed ZA, Reynolds HM, Tian E, Samara NL, et al. (November 2021). "Furin cleavage of the SARS-CoV-2 spike is modulated by O-glycosylation". Proceedings of the National Academy of Sciences of the United States of America. 118 (47) e2109905118. Bibcode:2021PNAS..11809905Z. doi:10.1073/pnas.2109905118. PMC 8617502. PMID 34732583. S2CID 242937417.
Yamasoba D, Kimura I, Nasser H, Morioka Y, Nao N, Ito J, et al. (9 June 2022). "Virological characteristics of the SARS-CoV-2 Omicron BA.2 spike". Cell. 185 (12): 2103–2115. bioRxiv 10.1101/2022.02.14.480335v1. doi:10.1016/j.cell.2022.04.035. PMC 9057982. PMID 35568035. S2CID 246905491.
Del Rio C, Malani PN (June 2022). "COVID-19 in 2022-The Beginning of the End or the End of the Beginning?". JAMA. 327 (24): 2389–2390. doi:10.1001/jama.2022.9655. PMID 35622357. S2CID 249096741.
Cao Y, Wang J, Jian F, Xiao T, Song W, Yisimayi A, et al. (February 2022). "Omicron escapes the majority of existing SARS-CoV-2 neutralizing antibodies". Nature. 602 (7898): 657–663. doi:10.1038/d41586-021-03796-6. PMC 8866119. PMID 35016194. S2CID 245455422.
Liu L, Iketani S, Guo Y, Chan JF, Wang M, Liu L, et al. (February 2022). "Striking antibody evasion manifested by the Omicron variant of SARS-CoV-2". Nature. 602 (7898): 676–681. doi:10.1038/d41586-021-03826-3. PMID 35016198. S2CID 245462866.
Mohsin M, Mahmud S (May 2022). "Omicron SARS-CoV-2 variant of concern: A review on its transmissibility, immune evasion, reinfection, and severity". Medicine. 101 (19) e29165. doi:10.1097/MD.0000000000029165. PMC 9276130. PMID 35583528. S2CID 248858919.
Cele S, Jackson L, Khoury DS, Khan K, Moyo-Gwete T, Tegally H, et al. (COMMIT-KZN Team) (February 2022). "Omicron extensively but incompletely escapes Pfizer BNT162b2 neutralization". Nature. 602 (7898): 654–656. Bibcode:2022Natur.602..654C. doi:10.1038/s41586-021-04387-1. PMC 8866126. PMID 35016196. S2CID 245879254.
Callaway E (December 2021). "Omicron likely to weaken COVID vaccine protection". Nature. 600 (7889): 367–368. Bibcode:2021Natur.600..367C. doi:10.1038/d41586-021-03672-3. PMID 34880488. S2CID 245007078.
Suryawanshi RK, Chen IP, Ma T, Syed AM, Brazer N, Saldhi P, et al. (May 2022). "Limited cross-variant immunity from SARS-CoV-2 Omicron without vaccination". Nature. 607 (7918): 351–355. Bibcode:2022Natur.607..351S. doi:10.1038/s41586-022-04865-0. PMC 9279157. PMID 35584773. S2CID 248890159.
CDC COVID-19 Response Team (December 2021). "SARS-CoV-2 B.1.1.529 (Omicron) Variant - United States, December 1-8, 2021". MMWR. Morbidity and Mortality Weekly Report. 70 (50). Center for Disease Control: 1731–1734. doi:10.15585/mmwr.mm7050e1. PMC 8675659. PMID 34914670. S2CID 245071514. Archived from the original on 20 December 2021. Retrieved 17 December 2021.
Cao Y, Wang J, Jian F, Xiao T, Song W, Yisimayi A, et al. (February 2022). "Omicron escapes the majority of existing SARS-CoV-2 neutralizing antibodies". Nature. 602 (7898): 657–663. doi:10.1038/d41586-021-03796-6. PMC 8866119. PMID 35016194. S2CID 245455422.
Maxmen A (December 2021). "Omicron blindspots: why it's hard to track coronavirus variants". Nature. 600 (7890): 579. Bibcode:2021Natur.600..579M. doi:10.1038/d41586-021-03698-7. PMID 34916668. S2CID 245262198.

sfgate.com (Global: 166^th place; English: 121^st place)

Graff A (1 December 2021). "First case of omicron in US identified in San Francisco". San Francisco Chronicle. Archived from the original on 1 December 2021. Retrieved 1 December 2021.

sky.com (Global: 431^st place; English: 274^th place)

news.sky.com

"Omicron 'sub-lineage' BA.2 designated as COVID variant under investigation, says UKHSA". Sky News. 21 January 2022. Archived from the original on 21 January 2022. Retrieved 21 January 2022.

sloveniatimes.com (Global: low place; English: low place)

"Omicron confirmed in all Slovenian regions but one". Slovenia Times. 21 December 2021. Archived from the original on 22 December 2021. Retrieved 22 December 2021.
"Omicron estimated to represent 40% of all coronavirus cases in Slovenia". Slovenia Times. 30 December 2021. Retrieved 1 January 2022. The National Laboratory of Health, Environment and Food said today it had confirmed 981 omicron cases with PCR tests...

sme.sk (Global: 2,077^th place; English: 3,395^th place)

spectator.sme.sk

"First Omicron cases confirmed in Slovakia". The Slovak Spectator. 11 December 2021. Retrieved 12 December 2021. First three Omicron cases have been confirmed in Slovakia.

snopes.com (Global: 944^th place; English: 678^th place)

Evon D (14 July 2022). "Why Are People Calling COVID-19 Variant BA.2.75 'Centaurus'?". Snopes.com. Archived from the original on 18 July 2022. Retrieved 15 July 2022.

sofiaglobe.com (Global: low place; English: low place)

"Covid-19 in Bulgaria: Omicron variant found in 12 samples sequenced by NCIPD". The Sofia Globe. 2 January 2022. Retrieved 3 January 2022.

spkc.gov.lv (Global: low place; English: low place)

"Pagājušajā nedēļā par trešdaļu pieaudzis Covid-19 inficēto skaits | Slimību profilakses un kontroles centrs". www.spkc.gov.lv (in Latvian). Retrieved 4 January 2022.

ssi.dk (Global: low place; English: low place)

ssi.dk

"Status på omikron-varianten (B.1.1.529) pr. 05.12.21" [Status of the Omicron variant (B.1.1.529) per 05.12.21] (in Danish). Statens Serum Institut. Archived from the original on 7 December 2021. Retrieved 18 December 2021.
Covid-19 Rapport om omikronvarianten [Status of the SARS-CoV-2 variant Omicron in Denmark] (PDF) (Report) (in Danish). Statens Serum Institut. 20 December 2021. Archived (PDF) from the original on 21 December 2021. Retrieved 21 December 2021.
Ekspertrapport den 17. december 2021 – Scenarier for smittetal og nyindlæggelser med omikronvarianten [Expert report 17 December 2021 – Scenarios for infection numbers and new hospitalizations with the Omicron-variant] (PDF) (Report) (in Danish). Statens Serum Institut. 18 December 2021. Archived (PDF) from the original on 19 December 2021. Retrieved 18 December 2021.

covid19.ssi.dk

"Variant-PCR-testen (tidl. Delta-PCR-testen)" (in Danish). Statens Serum Institut. 21 December 2021. Archived from the original on 7 February 2021. Retrieved 17 January 2022.
"Omikron (B.1.1.529)" [Omicron (B.1.1.529)] (in Danish). Statens Serum Institut. Retrieved 21 December 2021.

files.ssi.dk

"Variant-PCR svar fra 27. nov. og frem, Testcenter Danmark" (in Danish). Archived from the original on 27 December 2021. Retrieved 27 December 2021.

straitstimes.com (Global: 543^rd place; English: 346^th place)

Yong C (26 November 2021). "Singapore bans travellers from 7 African countries; no cases of new Covid-19 variant here". The Straits Times. Singapore. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
Auto, Hermes (22 December 2021). "More Omicron cases picked up in Singapore; community spread a matter of time: MOH | The Straits Times". www.straitstimes.com. Retrieved 22 December 2021.

suckhoedoisong.vn (Global: low place; English: low place)

"Ngày 19/1: Có 15.959 ca COVID-19, Hà Nội vẫn nhiều nhất; Đã ghi nhận 108 ca nhiễm biến chủng Omicron" (in Vietnamese). Retrieved 19 January 2022.

sudouest.fr (Global: 1,740^th place; English: 6,644^th place)

"Variant Omicron: premiers cas détectés en Guadeloupe et à Saint-Martin" [Omicron variant: first cases detected in Guadeloupe and Saint-Martin]. SudOuest (in French). 18 December 2021. ISSN 1760-6454. Retrieved 10 January 2022.

swr.de (Global: 1,755^th place; English: 8,499^th place)

Braun A (27 October 2022). "Neue Corona-Subvariante BQ.1.1 - "Höllenhund"-Virusvariante ist in Deutschland angekommen". SWR Wissen (in German). Südwestrundfunk. Archived from the original on 31 October 2022. Retrieved 31 October 2022.

tass.ru (Global: 260^th place; English: 1,423^rd place)

"В России выявили более 250 случаев заболевания подвидом омикрон-штамма ВA.2". TASS. 2 February 2022. Retrieved 2 February 2022.
"В России впервые с октября выявили менее 200 тыс. случаев ковида за неделю". ТАСС. Retrieved 20 December 2021.
"В Северной Македонии выявили первый случай заражения омикрон-штаммом". ТАСС. Retrieved 26 December 2021.

tbsnews.net (Global: 5,226^th place; English: 3,042^nd place)

"Bangladesh reports first Omicron cases". Business Standard. 11 December 2021. Retrieved 12 December 2021.

telam.com.ar (Global: 2,436^th place; English: 8,352^nd place)

"Córdoba confirmó 454 casos de la variante Ómicron de coronavirus" [Córdoba confirmed 454 cases of the Omicron variant of coronavirus] (in Spanish). Télam. 19 December 2021. Retrieved 19 December 2021.

terviseamet.ee (Global: low place; English: low place)

"Tänahommikuse seisuga on haiglas 274 koroonaviirusega nakatunud patsienti" [As of this morning, the hospital has 274 patients infected with the coronavirus]. terviseamet.ee (in Estonian). 13 December 2021. Retrieved 13 December 2021. Eestis on tuvastatud kokku 26 koroonapositiivset, kelle puhul viitab genotüpiseerimine omikron tüvele, nendest kuus on kinnitatud sekveneerimise käigus... A total of 26 corona-positive cases have been identified in Estonia, in which case genotyping indicates an omicron strain, six of which have been confirmed during sequencing...
"Tänahommikuse seisuga on haiglas 220 koroonaviirusega nakatunud patsienti | Terviseamet". www.terviseamet.ee (in Estonian). Retrieved 22 December 2021.
"Tänahommikuse seisuga on haiglas 231 koroonaviirusega nakatunud patsienti | Terviseamet". www.terviseamet.ee (in Estonian). Retrieved 31 December 2021.

tga.gov.au (Global: 3,984^th place; English: 2,622^nd place)

"Post-market review of antigen and rapid antigen tests". Archived from the original on 15 August 2023. Retrieved 15 August 2023.

theconversation.com (Global: 928^th place; English: 651^st place)

Zwi A (28 November 2021). "Travel bans aren't the answer to stopping new COVID variant Omicron". The Conversation. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Nathan Bartlett (9 July 2024). "From FLiRT to FLuQE: what to know about the latest COVID variants on the rise". The Conversation. ISSN 2431-2134. Wikidata Q127329080. Archived from the original on 10 July 2024.

thedailyherald.sx (Global: low place; English: low place)

"First Omicron cases in Aruba". The Daily Herald. 20 December 2021. Retrieved 21 December 2021.

thefederal.com (Global: low place; English: 7,584^th place)

Acharya, Ashutosh (29 December 2021). "Omicron most transmissible COVID-19 variant but not threatening Singapore: Experts". The Federal. Retrieved 29 December 2021.

theguardian.com (Global: 12^th place; English: 11^th place)

Adams R (24 December 2021). "Omicron's cold-like symptoms mean UK guidance 'needs urgent update'". The Guardian. Archived from the original on 25 December 2021.
Tcholakian D (15 December 2021). "'Omni is everywhere': why do so many people struggle to say Omicron?". The Guardian. Archived from the original on 23 December 2021. Retrieved 23 December 2021.
"BioNTech says it could tweak Covid vaccine in 100 days if needed". The Guardian. 26 November 2021. Archived from the original on 27 November 2021. Retrieved 27 November 2021.
Davis N (20 May 2022). "Two types of Omicron classified as Covid variants of concern in UK". the Guardian. Archived from the original on 10 June 2022. Retrieved 14 June 2022.
Geddes L (29 November 2021). "What does appearance of Omicron variant mean for the double-vaccinated?". The Guardian. London. Archived from the original on 29 November 2021. Retrieved 29 November 2021.
McKie R (5 December 2021). "Omicron: what do we know about the new Covid variant?". The Guardian. Archived from the original on 5 December 2021. Retrieved 4 September 2024.
"Boosters increase protection against death from Omicron in over-50s to 95% – UKHSA". The Guardian. 27 January 2022. Archived from the original on 29 January 2022. Retrieved 27 January 2022.
Geddes L (15 December 2021). "How big is the risk of Omicron in the UK and how do we know?". The Guardian. Archived from the original on 21 December 2021. Retrieved 15 December 2021.
"Only one approved rapid test in Australia explicitly states it detects Omicron". the Guardian. 27 January 2022. Archived from the original on 30 January 2022. Retrieved 30 January 2022.
Sample I, Walker P (7 December 2021). "Scientists find 'stealth' version of Omicron that may be harder to track". www.theguardian.com. Archived from the original on 7 December 2021. Retrieved 7 December 2021.
"Omicron seems to carry higher Covid reinfection risk, says South Africa". The Guardian. 2 December 2021. Archived from the original on 3 December 2021. Retrieved 3 December 2021.
"Omicron becomes dominant variant in South Africa". The Guardian. 2 December 2021. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Papua New Guinea reports first Omicron cases, amid fears over low vaccination rate". the Guardian. 19 January 2022. Retrieved 19 January 2022.

thelancet.com (Global: 2,393^rd place; English: 3,174^th place)

Uriu K, Okumura K, Uwamino Y, Chen L, Tolentino JE, Asakura H, Nagashima M, Sadamasu K, Yoshimura K, Ito J, Sato K; Genotype to Phenotype Japan (G2P-Japan) Consortium (2025). "Virological characteristics of the SARS-CoV-2 NB.1.8.1 variant". The Lancet. Infectious Diseases. doi:10.1016/S1473-3099(25)00356-1. PMID 40489985.
Kaku, Yu; Okumura, Kaho; Kawakubo, Shusuke; Uriu, Keiya; Chen, Luo; Kosugi, Yusuke; et al. (1 December 2024). "Virological characteristics of the SARS-CoV-2 XEC variant". The Lancet. 24 (12): e736. doi:10.1016/S1473-3099(24)00731-X. ISSN 1473-3099. PMID 39521009. Retrieved 25 July 2025.
Guo, Caiwan; Yu, Yuanling; Liu, Jingyi; Jian, Fanchong; Yang, Sijie; Song, Weiliang; et al. (1 July 2025). "Antigenic and virological characteristics of SARS-CoV-2 variants BA.3.2, XFG, and NB.1.8.1". The Lancet. 25 (7): e374 – e377. doi:10.1016/S1473-3099(25)00308-1. ISSN 1473-3099. PMID 40484018. Retrieved 25 July 2025.

thestar.com.my (Global: 574^th place; English: 425^th place)

"BA.5 becomes dominant COVID-19 variant in Germany". The Star. Archived from the original on 24 June 2022. Retrieved 25 June 2022.
"Covid-19: 245 Omicron cases detected so far, 157 among umrah returnees, says Khairy". The Star. 6 January 2022. Retrieved 6 January 2022.
"Brunei detects another 7 Omicron cases". The Star (Malaysia). 28 December 2021. Retrieved 28 December 2021. Another seven new Omicron cases have been detected in the Sultanate following the first case found on Dec 22...

thesundaily.my (Global: 6,259^th place; English: 4,222^nd place)

"Singapore reports 24 confirmed Omicron cases as at Thursday". www.thesundaily.my. Retrieved 18 December 2021.

ticotimes.net (Global: low place; English: low place)

"Costa Rica Announces First Case of Omicron Variant". The Tico Times. 20 December 2021. Retrieved 21 December 2021.

timesofaddu.com (Global: low place; English: low place)

"Maldives reports 4 new Omicron cases". The Times of Addu. 15 December 2021. Retrieved 30 December 2021.

timesofisrael.com (Global: 571^st place; English: 403^rd place)

"Israeli trial, world's first, finds 4th dose 'not good enough' against Omicron". The Times of Israel. 18 January 2022. ISSN 0040-7909. Archived from the original on 30 March 2022. Retrieved 11 April 2022.
Schneider, Tal. "In Israel's first suspected Omicron death, vaccinated woman succumbs to virus". Times of Israel. Retrieved 29 December 2021.
"First case of Omicron coronavirus variant detected in Gaza". The Times of Israel. 26 December 2021.

timesofmalta.com (Global: 2,301^st place; English: 1,523^rd place)

Farrugia, Claire (3 January 2022). "Authorities keep silent on cases of Omicron". Times of Malta. Retrieved 7 January 2022. Nothing said after the announcement that the first two cases had been detected.

today.com (Global: 396^th place; English: 242^nd place)

Kee, Caroline (20 May 2024). "The new COVID variants spreading in the US are called 'FLiRT.' But why?". TODAY.com. Retrieved 29 May 2024.

trust.org (Global: 9,070^th place; English: 7,468^th place)

news.trust.org

"Cyprus detects first cases of COVID-19 Omicron variant". news.trust.org. Reuters. Retrieved 10 December 2021.
"Six cases of Omicron variant detected in Turkey – minister". Reuters. 11 December 2021. Retrieved 11 December 2021.

tv2.dk (Global: 1,963^rd place; English: 2,577^th place)

nyheder.tv2.dk

Larsen JA (21 January 2022). "Ny Omikron-variant tager over i Danmark – det ved vi om den" (in Danish). TV2. Archived from the original on 22 January 2022. Retrieved 21 January 2022.

twitter.com (Global: 23^rd place; English: 32^nd place)

"Prof. Albertsen deliberations". Twitter. Archived from the original on 14 December 2021. Retrieved 11 December 2021.
"Recording the First Cases Of Omicron Variant #OmanVSCovid19". Twitter. Retrieved 14 December 2021.
"Important Public Service Information". Twitter. Retrieved 29 December 2021.

umn.edu (Global: 1,266^th place; English: 860^th place)

cidrap.umn.edu

"Lung tissue study sheds light on fast Omicron spread". CIDRAP. 15 December 2021. Archived from the original on 16 December 2021. Retrieved 25 December 2021.

virological.org (Global: low place; English: low place)

"Selection analysis identifies significant mutational changes in Omicron that are likely to influence both antibody neutralization and Spike function (Part 1 of 2)". 5 December 2021. Archived from the original on 17 November 2023. Retrieved 1 December 2023.
"Selection analysis identifies significant mutational changes in Omicron that are likely to influence both antibody neutralization and Spike function (Part 1 of 2)". Virological. 5 December 2021. Retrieved 12 December 2023.

washingtonpost.com (Global: 34^th place; English: 27^th place)

Keating D, Dong M, Shin Y (22 March 2022). "How fast omicron's BA.2 variant is spreading around the world". Washington Post. Archived from the original on 23 March 2022. Retrieved 24 March 2022.
Bernstein L (25 January 2022). "There's a new version of omicron but so far it doesn't appear to be more dangerous". Washington Post. Archived from the original on 25 January 2022. Retrieved 25 January 2022.
Bisset V (14 April 2023). "What to know about Arcturus, a new coronavirus subvariant the WHO is tracking". Washington Post. Archived from the original on 2 May 2023. Retrieved 15 April 2023.
"This latest covid variant could be the best yet at evading immunity". Washington Post. 25 August 2023. Retrieved 30 August 2023.
Berger M (28 November 2021). "South Africa, which found the omicron variant first, leads Africa in coronavirus sequencing". Washington Post. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Omicron variant more resistant to vaccine but causes less severe covid, major South African study concludes". Washington Post. ISSN 0190-8286. Retrieved 16 December 2021. Later information provided by a Discovery Health spokeswoman put the number of total cases at 78,173, of which 19,070 tests were positive during the "omicron period" from Nov. 15 to Dec. 7.

web.archive.org (Global: 1^st place; English: 1^st place)

Yadav PD, Gupta N, Potdar V, Mohandas S, Sahay RR, Sarkale P, et al. (January 2022). An in vitro and in vivo approach for the isolation of Omicron variant from human clinical specimens. p. 2022–01.02.474750. doi:10.1101/2022.01.02.474750. Archived from the original on 16 January 2022. Retrieved 16 January 2022.
Padin M (17 January 2022). "Feeling light-headed may be an early indication you have Omicron Covid variant". Daily Mirror. Archived from the original on 28 January 2022. Retrieved 30 January 2022.
Adams R (24 December 2021). "Omicron's cold-like symptoms mean UK guidance 'needs urgent update'". The Guardian. Archived from the original on 25 December 2021.
"Omicron Symptoms: Here's How They Differ From Other Variants". NBC Chicago. 7 January 2022. Archived from the original on 24 January 2022. Retrieved 30 January 2022.
Slater J (23 January 2022). "Is a change to your taste or smell a sign of Omicron?". Metro. Archived from the original on 26 January 2022. Retrieved 30 January 2022.
Scribner H (21 December 2021). "Doctor reveals new nightly omicron variant symptom". Deseret News. Archived from the original on 2 January 2022. Retrieved 1 January 2022.
"Does Omicron cause less damage to the lungs?". medicalnewstoday.com. 14 January 2022. Archived from the original on 9 February 2022. Retrieved 22 August 2023.
Murrison P (18 January 2022). "Omicron symptoms: Three distinctive rashes to watch for". Express.co.uk. Archived from the original on 12 January 2022. Retrieved 30 January 2022.
Patel V (27 November 2021). "How Omicron, the New Covid-19 Variant, Got Its Name". The New York Times. ISSN 0362-4331. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Tcholakian D (15 December 2021). "'Omni is everywhere': why do so many people struggle to say Omicron?". The Guardian. Archived from the original on 23 December 2021. Retrieved 23 December 2021.
Zimmer B (2 December 2021). "'Omicron': Greek's 'Little O' Will Loom Larger Now". Wall Street Journal. ISSN 0099-9660. Archived from the original on 3 December 2021. Retrieved 23 December 2021. President Joe Biden stumbled over the pronunciation in a press conference on Monday, calling the variant "omnicron" with an extra "n" sound. It has also been frequently misspelled that way online. The confusion is understandable, since we're more familiar with words that have the Latin prefix "omni-" meaning "all," as in "omnipresent" or "omnivore."
"In focus". gisaid.org. GISAID. 28 November 2021. Archived from the original on 21 January 2021. Retrieved 28 November 2021. The unique mix of spike amino acid changes in Omicron GR/484A (B.1.1.529) is of interest as it comprises several that were previously known to affect receptor binding and antibody escape.
"Variant: 21K (Omicron)". covariants.org. CoVariants. 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021. Variant 21K (Omicron) appears to have arisen in November 2021, possibly in South Africa.
"SARS-CoV-2 variants of concern and variants under investigation in England" (PDF). Archived from the original (PDF) on 5 November 2023.
"The mystery of where omicron came from — and why it matters". NPR. 1 December 2021. Archived from the original on 9 December 2021. Retrieved 8 December 2021.
"Study on the origins of Omicron retracted". www.charite.de. 20 December 2022. Archived from the original on 24 December 2022. Retrieved 24 December 2022. In a subsequent analysis of residual samples, they were found to be contaminated. It is no longer possible to establish the source of the contamination.
"'We made a mistake.' Omicron origin study retracted after widespread criticism". science.org. 20 December 2022. Archived from the original on 24 December 2022. Retrieved 24 December 2022. But Kristian Andersen [...] says the gradual evolution theory was already "off the table" before the paper was published.
Cowan K (29 November 2021). "Inside SA leg of Omicron variant discovery: A single test result, a missing gene, and an email". News24. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
ינקו, אדיר; שומפלבי, אטילה (26 November 2021). "מחוסנת ב-3 מנות ואישה שנסעה לאילת באוטובוס: המאומתים לזן החדשt". Ynet (in Hebrew). Archived from the original on 27 November 2021. Retrieved 28 November 2021. "4 מאומתים לווריאנט החדש התגלו בארץ, רה"מ יקיים מסיבת עיתונאים ב-14:30" translated: "4 verified for the new variant were discovered in the country, the prime minister will hold a press conference at 14:30
Tlhankane S (25 November 2021). "Four cases of the new COVID-19 variant recorded in Botswana". Mmegi Online. Archived from the original on 26 November 2021. Retrieved 4 September 2024.
Kesselgruber K (27 November 2021). "Flughafen Frankfurt: Person mit Omikron-Verdacht war vollständig geimpft" [Frankfurt airport: Person suspected to be infected with Omicron Variant was fully vaccinated]. Frankfurter Rundschau (in German). Archived from the original on 27 November 2021. Retrieved 27 November 2021.
"UK, Germany and Italy detect Omicron coronavirus variant cases". Reuters. 27 November 2021. Archived from the original on 27 November 2021. Retrieved 27 November 2021.
"Coronavirus variant Omicron found in 13 positive tests so far | RIVM". www.rivm.nl. Archived from the original on 6 December 2021. Retrieved 6 December 2021.
"Actuele informatie over COVID-19 | RIVM" [Current information about COVID-19 | RIVM]. www.rivm.nl (in Dutch). 4 December 2021. Archived from the original on 6 April 2020. Retrieved 6 December 2021.
"61 travellers from South Africa in Netherlands positive for COVID-19 – authorities". Reuters. Amsterdam. 27 November 2021. Archived from the original on 26 November 2021. Retrieved 27 November 2021.
"Travellers test positive to Omicron COVID-19 strain after arriving in Sydney from southern Africa, NSW Health says". ABC News. 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
"To personer er indrejst i Danmark med coronavarianten Omikron" [Two people have entered Denmark with the corona variant Omicron]. www.bt.dk (in Danish). 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Ritzau A (28 November 2021). "Nu er det bekræftet: To personer smittet med Omikron rejst ind i Danmark" [Now it has been confirmed: Two people infected with Omicron traveled into Denmark]. ekstrabladet.dk (in Danish). Archived from the original on 28 November 2021. Retrieved 28 November 2021.
"Austria detects suspect Omicron case as Europe battles virus surge". WION. 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
"Omicron variant found in UK, Germany, Czech Republic". New York Post. 28 November 2021. Archived from the original on 27 November 2021. Retrieved 28 November 2021.
"Canada, Netherland, Australia latest countries reporting cases of omicron COVID-19 variant". ABC13. 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Perera A (29 November 2021). "COVID-positive repatriation flight arrival to the Northern Territory tests positive to Omicron variant". ABC News. Archived from the original on 29 November 2021. Retrieved 29 November 2021.
Nguyen K (29 November 2021). "NSW Health confirms two more Omicron COVID-19 cases in travellers from southern Africa". ABC News. Archived from the original on 29 November 2021. Retrieved 29 November 2021.
"Live updates: Omicron variant". Cable News Network. 29 November 2021. Archived from the original on 30 November 2021. Retrieved 29 November 2021.
"Första fallet av omikron upptäckt i Sverige" [The first case of omicron detection in Sweden]. www.aftonbladet.se (in Swedish). 29 November 2021. Archived from the original on 30 November 2021. Retrieved 29 November 2021.
"Spain detects first Omicron case, COVID-19 infections rise". Reuters. 29 November 2021. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
"Omicron variant found in two previous test samples | RIVM". www.rivm.nl. Archived from the original on 4 December 2021. Retrieved 6 December 2021.
"NSW records fifth case of Omicron COVID-19 variant as two more potential infections investigated". ABC News. 30 November 2021. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
"Japan's first Omicron case may help portray PM Kishida as decisive". Reuters. 30 November 2021. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
"Two Israeli doctors test positive for Omicron COVID variant". The Jerusalem Post. 30 November 2021. Archived from the original on 31 December 2021. Retrieved 30 November 2021.
"SP confirma terceiro caso da variante ômicron" [SP confirms third case of ômicron variant]. g1 (in Brazilian Portuguese). 1 December 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"O que se sabe sobre os primeiros casos confirmados da variante Ômicron no Brasil" [What is known about the first confirmed cases of the Ômicron variant in Brazil]. CNN Brasil (in Brazilian Portuguese). 30 November 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"Passa para 6 o número de casos suspeitos da variante Ômicron investigados no Brasil" [The number of suspected cases of the Ômicron variant investigated in Brazil goes to 6]. CNN Brasil (in Brazilian Portuguese). 30 November 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"Germany: Leipzig reports first Omicron variant case with no travel history". Free Press Journal. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
Dahir A, Ezeamalu B, Pérez-Peña R (1 December 2021). "Ghana and Nigeria are the latest African countries to detect the Omicron variant". The New York Times. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Nigeria confirms first cases of Omicron among travellers from South Africa". Reuters. 1 December 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
Graff A (1 December 2021). "First case of omicron in US identified in San Francisco". San Francisco Chronicle. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
Stark K, Rodriguez JF, Dillon RM (1 December 2021). "First U.S. Case of Omicron Variant Found in San Francisco Resident". San Francisco: KQED. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
O'Donnell D (1 December 2021). "Case of Omicron variant confirmed in Ireland". RTÉ News and Current Affairs. Archived from the original on 3 December 2021. Retrieved 12 December 2021.
"South Korea reports five Omicron cases on flight from Nigeria". Reuters. 1 December 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"Dutch say 14 air passengers from S. Africa with Omicron were vaccinated". Reuters. 2 December 2021. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Number of confirmed omicron cases as of 3 December". Folkehelseinstituttet. 4 December 2021. Archived from the original on 4 December 2021. Retrieved 4 December 2021.
"France now has 25 Omicron Covid variant cases – minister". Reuters. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 7 December 2021.
"Omicron sudah sampai ke Malaysia". Malaysiakini. 3 December 2021. Archived from the original on 3 December 2021. Retrieved 8 December 2021.
"Namibia detects Omicron coronavirus variant in 18 of 19 samples". Reuters. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 7 December 2021.
"Fijians test positive for Omicron variant – Govt". RNZ. 7 December 2021. Archived from the original on 6 December 2021. Retrieved 8 December 2021.
"Africa accounts for 46% of reported cases of Omicron, WHO official says". Reuters. 9 December 2021. Archived from the original on 10 December 2021. Retrieved 9 December 2021.
"Covid: First UK death recorded with Omicron variant". BBC News. 13 December 2021. Archived from the original on 20 December 2021. Retrieved 13 December 2021.
"First Omicron case detected in New Zealand". Ministry of Healfh. 16 December 2021. Archived from the original on 20 December 2021. Retrieved 16 December 2021.
"COVID: Germany records first death from omicron variant". DW. 23 December 2021. Archived from the original on 24 December 2021. Retrieved 23 December 2021.
"Australia: Omicron death, false negative COVID results". Al Jazeera. 27 December 2021. Archived from the original on 27 December 2021. Retrieved 27 December 2021.
"U.S. CDC estimates Omicron variant to be 58.6% of cases, revises projection". Reuters. 28 December 2021. Archived from the original on 6 March 2022. Retrieved 15 April 2022.
"S.Korea reports first deaths linked to Omicron coronavirus variant – Yonhap". Reuters. 3 January 2022. Archived from the original on 3 January 2022. Retrieved 3 January 2022.
"Statement on the update of WHO's working definitions and tracking system for SARS-CoV-2 variants of concern and variants of interest" (Statement). World Health Organization. 16 March 2023. Archived from the original on 8 June 2023. Retrieved 20 May 2023.
Goodman B (29 March 2022). "Omicron subvariant BA.2 is now the dominant strain of Covid-19 in the US, CDC says". CNN. Archived from the original on 29 March 2022. Retrieved 29 March 2022.
"COVID Data Tracker". Centers for Disease Control and Prevention. 28 March 2020. Archived from the original on 22 May 2021. Retrieved 29 March 2022.
Vogel G (22 May 2022). "New versions of Omicron are masters of immune evasion". Science. 376 (6594): 679–680. doi:10.1126/science.adc9448. PMID 35549399. Archived from the original on 7 March 2023. Retrieved 20 November 2022.
"BioNTech says it could tweak Covid vaccine in 100 days if needed". The Guardian. 26 November 2021. Archived from the original on 27 November 2021. Retrieved 27 November 2021.
"Novavax developing vaccine that targets new COVID-19 variant". CBS Baltimore Staff. 30 November 2021. Archived from the original on 2 December 2021. Retrieved 4 December 2021.
Maddipatla M, Roy M (26 November 2021). "Maryland-Based Vaccine Manufacturer Developing COVID-19 Vaccine That Targets Omicron Variant". Reuters. Archived from the original on 28 November 2021. Retrieved 30 November 2021.
"Sputnik V maker: Vaccine could be adapted to fight omicron". ABC News. Moscow. Associated Press. 29 November 2021. Archived from the original on 2 December 2021. Retrieved 29 November 2021.
"Sinovac and world's Covid-19 vaccine makers 'ready' to produce Omicron jab". South China Morning Post. 29 November 2021. Archived from the original on 30 November 2021. Retrieved 29 November 2021.
"Sinovac prevê atualização da Coronavac para variante Ômicron em até três meses" [Sinovac plans to update Coronavac to the Omicron variant within three months]. CNN Brazil (in Portuguese). 7 December 2021. Archived from the original on 9 December 2021. Retrieved 9 December 2021.
"Cuba to update domestic vaccine to battle Omicron". Al Jazeera. 2 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.
Spencer K (10 January 2022). "Pfizer CEO says omicron vaccine will be ready in March". CNBC. Archived from the original on 26 January 2022. Retrieved 27 January 2022.
"Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern". World Health Organization (WHO). 26 November 2021. Archived from the original on 26 November 2021.
"WHO cautions against imposing travel restrictions due to new variant". Reuters. Geneva. 26 November 2021. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
"Implications of the emergence and spread of the SARS-CoV-2 B.1.1.529 variant of concern (Omicron) for the EU/EEA" (PDF). ecdc.europa.eu. Archived (PDF) from the original on 26 November 2021. Retrieved 26 November 2021.
"Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern". World Health Organization. 26 November 2021. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
Nebehay S, Winning A (26 November 2021). "WHO names new COVID variant omicron, cautions against travel measures". Reuters. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
"Omicron poses very high global risk, world must prepare -WHO". Reuters. Geneva. 29 November 2021. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
"Covid live updates today: Omicron variant, symptoms, vaccines efficacy, restrictions..." en.as. 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
"World closing its doors to African countries due to omicron". aa.com. 30 November 2021. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
Yong C (26 November 2021). "Singapore bans travellers from 7 African countries; no cases of new Covid-19 variant here". The Straits Times. Singapore. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
"Anvisa recomenda restrições de voo diante de nova variante de covid-19" [Anvisa recommends flight restrictions in view of the new covid-19 variant]. agenciabrasil.ebc.com.br. 26 November 2021. Archived from the original on 26 November 2021. Retrieved 27 November 2021.
Kennedy M, Price RD (26 November 2021). "'It's Coming': NY Declares State of Emergency Ahead of Potential Omicron Spike". NBC New York. Archived from the original on 26 November 2021. Retrieved 27 November 2021.
"Switzerland announces new restrictions for Israelis after the discovery of Omicron". Globally 24. Archived from the original on 27 November 2021. Retrieved 27 November 2021.
Winning A, Cocks T (26 November 2021). "South Africa says travel bans over new variant unjustified". Reuters. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
Zwi A (28 November 2021). "Travel bans aren't the answer to stopping new COVID variant Omicron". The Conversation. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
"EXCLUSIVE South Africa delays COVID vaccine deliveries as inoculations slow". Reuters. 24 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Kaitlan Collins and Kate Sullivan (29 November 2021). "Biden says new Omicron variant is 'cause for concern, not a cause for panic'". CNN. Archived from the original on 2 December 2021. Retrieved 1 December 2021.
"New COVID-19 restrictions in effect for parts of Canada; some productions cancelled". CTVNews. 20 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.
"B.C. enacts social gathering and event capacity limits as Omicron variant spreads". Global News. Archived from the original on 19 December 2021. Retrieved 18 December 2021.
"B.C. limits indoor gatherings, cancels New Year's Eve events as Omicron picks up speed". CBC News. 17 December 2021. Archived from the original on 20 December 2021. Retrieved 17 December 2021.
"Quebec shutting down schools, bars, gyms tonight as COVID-19 cases soar". CTV News Montreal. 20 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.
Meijer BH, van den Berg S (18 December 2021). "Netherlands to go into strict Christmas lockdown". Reuters. Archived from the original on 2 January 2022. Retrieved 2 January 2022.
"As Omicron threatens a global surge, some countries shorten COVID-19 booster timelines". Reuters. 20 December 2022. Archived from the original on 15 January 2022. Retrieved 15 January 2022.
"Selection analysis identifies significant mutational changes in Omicron that are likely to influence both antibody neutralization and Spike function (Part 1 of 2)". 5 December 2021. Archived from the original on 17 November 2023. Retrieved 1 December 2023.
Cella E, Benedetti F, Fabris S, Borsetti A, Pezzuto A, Ciotti M, et al. (2021). "SARS-CoV-2 Lineages and Sub-Lineages Circulating Worldwide: A Dynamic Overview". Chemotherapy. 66 (1–2): 3–7. doi:10.1159/000515340. PMC 8089399. PMID 33735881. Archived from the original on 29 October 2023. Retrieved 1 December 2023.
Karthik Gangavarapu; Alaa Abdel Latif; Julia Mullen; Manar Alkuzweny; Emory Hufbauer; Ginger Tsueng; et al. (18 August 2022). "Lineage Comparison". Outbreak.info. Archived from the original on 24 June 2021. Retrieved 24 August 2022.
Karthik Gangavarapu; Alaa Abdel Latif; Julia Mullen; Manar Alkuzweny; Emory Hufbauer; Ginger Tsueng; et al. (19 August 2022). "Omicron Variant Report". Outbreak.info. Archived from the original on 20 August 2022. Retrieved 24 August 2022.
McGregor G (21 January 2022). "What is 'stealth Omicron'? The rise of the subvariant is alarming some scientists who say it needs its own Greek letter". Fortune. Archived from the original on 23 January 2022. Retrieved 23 January 2022.
"SARS-CoV-2 variants of concern and variants under investigation in England – Technical briefing 29" (PDF). gov.uk. UK Health Security Agency. 26 November 2021. p. 18. Archived (PDF) from the original on 27 November 2021. Retrieved 10 December 2021.
"BA.2 Lineage Report, India". outbreak.info (Scripps Research). 4 February 2022. Archived from the original on 5 February 2022. Retrieved 5 February 2022.
Kunkalikar B (31 October 2022). "SARS-CoV-2 Omicron BA.2 less severe than Delta and original Omicron". News-Medical.net. Archived from the original on 6 November 2022. Retrieved 6 November 2022.
"BA.2 Lineage Report". outbreak.info (Scripps Research). 21 January 2022. Archived from the original on 13 December 2021. Retrieved 21 January 2022.
"COVID-19 Weekly Epidemiological Update, Edition 77" (PDF). World Health Organization. 1 February 2022. Archived (PDF) from the original on 3 February 2022. Retrieved 2 February 2022.
"COVID-19 Weekly Epidemiological Update, Edition 82". World Health Organization. 8 March 2022. Archived from the original on 13 March 2022. Retrieved 12 March 2022.
"COVID-19 Weekly Epidemiological Update, Edition 84". World Health Organization. 22 March 2022. Archived from the original on 26 March 2022. Retrieved 25 March 2022.
Keating D, Dong M, Shin Y (22 March 2022). "How fast omicron's BA.2 variant is spreading around the world". Washington Post. Archived from the original on 23 March 2022. Retrieved 24 March 2022.
"COVID-19 Weekly Epidemiological Update, Edition 80". World Health Organization. 22 February 2022. Archived from the original on 10 March 2022. Retrieved 12 March 2022.
"Variant Proportions". Centers for Disease Control and Prevention. 28 March 2020. Archived from the original on 24 August 2020. Retrieved 12 March 2022.
Carassio J (7 February 2022). "BA.1.1, un nouveau sous-variant d'Omicron déjà très répandu en France". Le Progrès. Archived from the original on 12 March 2022. Retrieved 12 March 2022.
"BA.1.1 Lineage Report, United States, France and Japan". outbreak.info (Scripps Research). 12 March 2022. Archived from the original on 14 March 2022. Retrieved 12 March 2022.
Yengkhom S (11 January 2022). "BA.2 'stealth' variant makes up 80% of Kolkata's Omicron infections". The Times of India. Archived from the original on 16 January 2022. Retrieved 17 January 2022.
"Omicron 'sub-lineage' BA.2 designated as COVID variant under investigation, says UKHSA". Sky News. 21 January 2022. Archived from the original on 21 January 2022. Retrieved 21 January 2022.
"SARS-CoV-2 Sequencing Update 14 January 2022" (PDF). Network for Genomic Surveillance in South Africa. 14 January 2022. Archived (PDF) from the original on 17 January 2022. Retrieved 17 January 2022.
"Omicron sub-variant BA.2 'under investigation' by UK health officials". The Independent. 23 January 2022. Archived from the original on 23 January 2022. Retrieved 23 January 2022.
Österman H (11 January 2022). "Undergrupp av omikron ökar: "Kan vara ännu mer smittsam"" (in Swedish). Aftonbladet. Archived from the original on 11 January 2022. Retrieved 17 January 2022.
"SARS-CoV-2の変異株B.1.1.529系統(オミクロン株)について(第6報)" (in Japanese). National Institute of Infectious Diseases (Japan). 14 January 2022. Archived from the original on 20 January 2022. Retrieved 24 January 2022.
"新型コロナウイルス感染症(変異株)の患者等の発生について(空港検疫))" (in Japanese). National Institute of Infectious Diseases (Japan). 20 January 2022. Archived from the original on 20 January 2022. Retrieved 24 January 2022.
"新型コロナウイルス感染症(変異株)の患者等の発生について(空港検疫)" (in Japanese). National Institute of Infectious Diseases (Japan). 24 January 2022. Archived from the original on 24 January 2022. Retrieved 24 January 2022.
"Genomic overview of SARS-CoV-2 in Denmark". Danish Covid-19 Genome Consortium. 29 January 2022. Archived from the original on 20 December 2021. Retrieved 29 January 2022.
Bernstein L (25 January 2022). "There's a new version of omicron but so far it doesn't appear to be more dangerous". Washington Post. Archived from the original on 25 January 2022. Retrieved 25 January 2022.
"Enhancing response to Omicron SARS-CoV-2 variant: Technical brief and priority actions for Member States" (PDF). World Health Organization. 21 January 2022. Archived (PDF) from the original on 27 January 2022. Retrieved 24 January 2022.
"COVID-19 Ukerapport – uke 2" (PDF) (in Norwegian). Norwegian Institute of Public Health. 19 January 2022. Archived (PDF) from the original on 27 January 2022. Retrieved 25 January 2022.
Winning A, Shirbon E (10 February 2022). "Omicron BA.2 sub-variant dominant in S.Africa, says CDC". Reuters. Archived from the original on 12 March 2022. Retrieved 12 March 2022.
"Wöchentlicher Lagebericht des RKI zur Coronavirus-Krankheit-2019 (COVID-19)" (PDF). Robert Koch Institute. 10 March 2022. Archived (PDF) from the original on 12 March 2022. Retrieved 12 March 2022.
"Covid infections rising again across UK - ONS". BBC News. 11 March 2022. Archived from the original on 13 March 2022. Retrieved 12 March 2022.
"BA.2 version of omicron is now dominant coronavirus variant in U.S., CDC says". NBC News. Reuters. 29 March 2022. Archived from the original on 29 March 2022. Retrieved 30 March 2022.
Evon D (14 July 2022). "Why Are People Calling COVID-19 Variant BA.2.75 'Centaurus'?". Snopes.com. Archived from the original on 18 July 2022. Retrieved 15 July 2022.
"Tracking SARS-CoV-2 variants". World Health Organization (WHO). Archived from the original on 9 June 2021. Retrieved 15 July 2022.
"Tracking SARS-CoV-2 variants". World Health Organization (WHO). Archived from the original on 3 February 2023. Retrieved 22 August 2023.
Hamzah F (12 October 2022). "CNA Explains: What you need to know about the XBB COVID-19 variant". channelnewsasia.com. Archived from the original on 8 December 2022. Retrieved 13 October 2022.
"Omicron Variant May Cause Another Covid Wave: WHO Chief Scientist". NDTV.com. Archived from the original on 9 February 2023. Retrieved 21 October 2022.
"Update on SARS-CoV-2 variants: ECDC assessment of the XBB.1.5 sub-lineage". European CDC. 9 January 2023. Archived from the original on 18 March 2023. Retrieved 12 January 2023.
"SARS-CoV-2 variants of concern as of 9 January 2023". European CDC. 9 January 2023. Archived from the original on 16 June 2021. Retrieved 12 January 2023.
Boyce L (12 April 2023). "LibGuides: SARS-CoV-2: SARS-CoV-2 Recombination". Memorial Sloan Kettering Cancer Center. Archived from the original on 15 June 2023. Retrieved 15 April 2023.
Bisset V (14 April 2023). "What to know about Arcturus, a new coronavirus subvariant the WHO is tracking". Washington Post. Archived from the original on 2 May 2023. Retrieved 15 April 2023.
O'Mary L (11 April 2023). "New COVID Variant on WHO's Radar Causing Itchy Eyes in Kids". WebMD. Archived from the original on 10 May 2023. Retrieved 16 April 2023.
Johnson A. "What We Know About 'Eris' Covid Variant EG.5: The Dominant Strain Driving An Uptick In Cases". Forbes. Archived from the original on 23 August 2023. Retrieved 11 August 2023.
"cov-lineages.org". Archived from the original on 27 March 2022. Retrieved 11 August 2023.
Mundasad S (10 August 2023). "What we know about the Covid variant EG.5 dubbed 'Eris'". BBC News. BBC. Archived from the original on 18 September 2023. Retrieved 10 August 2023.
"EG.5 Initial Risk Evaluation, 9 August 2023" (PDF). World Health Organization. 9 August 2023. Archived (PDF) from the original on 7 December 2023. Retrieved 11 August 2023.
"COVID Data Tracker". 28 March 2020. Archived from the original on 24 August 2020. Retrieved 12 March 2022.
Fiore K (18 October 2023). "What to Know About the HV.1 Variant". MedPage Today. Archived from the original on 21 February 2024. Retrieved 4 September 2024.
"WHO monitoring 2 more Omicron sub-variants known as BA.4 and BA.5". Canadian Broadcasting Corporation. 11 April 2022. Archived from the original on 13 April 2022. Retrieved 13 April 2022.
"BREAKING: ECDC upgrades Omicron Sublineages BA.4 and BA. 5 to Variants of Concern from Variants of Interest, making it the first public health authority". Medriva. 13 May 2022. Archived from the original on 14 May 2022. Retrieved 13 May 2022.
O'Regan E (13 May 2022). "Ireland and Europe at risk of new Covid surge as two new variants of concern declared". independent. Archived from the original on 22 August 2023. Retrieved 13 May 2022.
Davis N (20 May 2022). "Two types of Omicron classified as Covid variants of concern in UK". the Guardian. Archived from the original on 10 June 2022. Retrieved 14 June 2022.
"Variant BA.5: après le Portugal, les autres pays européens". Sciences et Avenir (in French). 25 May 2022. Archived from the original on 26 May 2022. Retrieved 25 May 2022.
Gilchrist K (24 June 2022). "UK Covid cases surge following Queen's Jubilee celebrations, new variants become dominant". CNBC. Archived from the original on 28 June 2022. Retrieved 24 June 2022.
"Omikron-Subtyp BA.5 herrscht jetzt in Deutschland vor". www.saechsische.de (in German). 24 June 2022. Archived from the original on 24 June 2022. Retrieved 24 June 2022.
"RKI - Coronavirus SARS-CoV-2 - Wochenbericht vom 23.6.2022" (PDF). www.rki.de. Archived (PDF) from the original on 23 June 2022. Retrieved 25 June 2022.
"BA.5 becomes dominant COVID-19 variant in Germany". The Star. Archived from the original on 24 June 2022. Retrieved 25 June 2022.
"Omicron sub-variants BA.4, BA.5 make up more than 50% of U.S. COVID cases - CDC". Reuters. 28 June 2022. Archived from the original on 28 June 2022. Retrieved 28 June 2022.
Hassan A (28 June 2022). "The Omicron subvariants BA.4 and BA.5 have together become dominant in the U.S., the C.D.C. estimates". The New York Times. ISSN 0362-4331. Archived from the original on 29 June 2022. Retrieved 28 June 2022.
SPF. "COVID-19: point épidémiologique du 30 juin 2022". www.santepubliquefrance.fr (in French). Archived from the original on 10 July 2022. Retrieved 1 July 2022.
"Variant Covid BA.5: majoritaire en France, quels symptômes?". sante.journaldesfemmes.fr (in French). Archived from the original on 9 July 2022. Retrieved 1 July 2022.
"BA.5.2.1 Lineage Report". Outbreak.info. Archived from the original on 13 July 2022. Retrieved 29 July 2022.
"Shanghai identifies new COVID Omicron subvariant". Reuters. 10 July 2022. Archived from the original on 30 July 2022. Retrieved 29 July 2022.
"SARS-CoV-2 Genomic Surveillance in Ontario, July 22, 2022" (PDF). Public Health Ontario. Archived (PDF) from the original on 19 July 2021. Retrieved 29 July 2022.
"Regeneron COVID-19 Dashboard". Regeneron. Archived from the original on 30 July 2022. Retrieved 29 July 2022.
"COVID-19: Summary data about travellers, testing and compliance". Government of Canada. 14 May 2021. Archived from the original on 4 August 2022. Retrieved 29 July 2022.
Mukeshsingh (23 December 2022). "Covid-19 Variant BF.7 Symptoms, Precautions, Transmission". Kpadhne. Archived from the original on 30 December 2022. Retrieved 25 December 2022.
"Verbreitet sich rasant: Eine der "besorgniserregendsten Varianten": So gefährlich ist BQ.1.1". FOCUS online (in German). 20 October 2022. Archived from the original on 31 October 2022. Retrieved 31 October 2022.
Danner C (21 October 2022). "What We Know About the New and Rising COVID Variants". Intelligencer. Vox Media, LLC. nymag.com. Archived from the original on 1 November 2022. Retrieved 1 November 2022.
Braun A (27 October 2022). "Neue Corona-Subvariante BQ.1.1 - "Höllenhund"-Virusvariante ist in Deutschland angekommen". SWR Wissen (in German). Südwestrundfunk. Archived from the original on 31 October 2022. Retrieved 31 October 2022.
"A new Omicron variant, BQ.1.1, is spreading throughout France". Le Monde.fr. 25 October 2022. Archived from the original on 3 January 2023. Retrieved 20 November 2022.
sante publique france. "COVID-19: epidemiological update. Weekly report. Week 45. 17 November 2022" (in French). Archived from the original on 28 November 2022. Retrieved 20 November 2022.
O'Mary L (14 November 2022). "BQ.1 and BQ.1.1 Become New Dominant COVID Subvariants". Medscape. Archived from the original on 25 November 2022. Retrieved 16 November 2022.
Rozsa M, Karlis N (28 January 2022). "Omicron variant of COVID-19 may be the most contagious virus to ever exist". Salon. Archived from the original on 28 January 2022. Retrieved 30 January 2022.
"LIVE – Covid: 'Staggering' Omicron case numbers expected – top health official". BBC News. 15 December 2021. Archived from the original on 22 December 2021. Retrieved 15 December 2021. See entry for 10:05
Wang R, Chen J, Wei GW (December 2021). "Mechanisms of SARS-CoV-2 Evolution Revealing Vaccine-Resistant Mutations in Europe and America" (PDF). The Journal of Physical Chemistry Letters. 12 (49): 11850–11857. doi:10.1021/acs.jpclett.1c03380. PMC 8672435. PMID 34873910. Archived (PDF) from the original on 18 December 2021. Retrieved 27 January 2022.
"Study findings suggest spread of Omicron can be ascribed to immune evasiveness rather than an increase in transmissibility". News-Medical.net. 5 January 2022. Archived from the original on 21 January 2022. Retrieved 17 January 2022.
"Omicron Variant: What You Need to Know". Centers for Disease Control and Prevention. 20 December 2021. Archived from the original on 27 January 2022. Retrieved 27 January 2022.
David Leonhardt (5 January 2022). "Omicron Is Milder". The New York Times. Archived from the original on 6 January 2022. Retrieved 7 January 2022. A few weeks ago, many experts and journalists were warning that the initial evidence from South Africa — suggesting that Omicron was milder than other variants — might turn out to be a mirage. It has turned out to be real.
"Why Omicron-infected white-tailed deer pose an especially big risk to humans". Fortune. Archived from the original on 13 February 2022. Retrieved 13 February 2022.
"Omicron survives longer on plastic, skin than prior variants; nose swabbing found best for rapid tests". Reuters. 24 January 2022. Archived from the original on 28 January 2022. Retrieved 28 January 2022.
"Pfizer And BioNTech Provide Update On Omicron Variant" (Press release). New York City and Mainz: Pfizer. 8 December 2021. Archived from the original on 21 December 2021. Retrieved 8 December 2021.
SARS-CoV-2 variants of concern and variants under investigation in England, technical briefing 31 (PDF) (Briefing). Public Health England. 10 December 2021. pp. 3–5, 20–22. GOV-10645. Archived (PDF) from the original on 18 December 2021. Retrieved 10 December 2021.
Ferguson N, Ghani A, Hinsley W, Volz E (22 December 2021). Hospitalisation risk for Omicron cases in England (Technical report). WHO Collaborating Centre for Infectious Disease Modelling, MRC Centre for Global Infectious Disease Analysis. Imperial College London. doi:10.25561/93035. Report 50. Archived (PDF) from the original on 23 December 2021.
"Israeli trial, world's first, finds 4th dose 'not good enough' against Omicron". The Times of Israel. 18 January 2022. ISSN 0040-7909. Archived from the original on 30 March 2022. Retrieved 11 April 2022.
Geddes L (29 November 2021). "What does appearance of Omicron variant mean for the double-vaccinated?". The Guardian. London. Archived from the original on 29 November 2021. Retrieved 29 November 2021.
McKie R (5 December 2021). "Omicron: what do we know about the new Covid variant?". The Guardian. Archived from the original on 5 December 2021. Retrieved 4 September 2024.
"Boosters increase protection against death from Omicron in over-50s to 95% – UKHSA". The Guardian. 27 January 2022. Archived from the original on 29 January 2022. Retrieved 27 January 2022.
"COVID-19 vaccine surveillance report Week 4" (PDF). UK Health Security Agency. 27 January 2022. Archived (PDF) from the original on 27 January 2022. Retrieved 27 January 2022.
"How soon after catching COVID-19 can you get it again?". ABC News. 2 May 2022. Archived from the original on 9 July 2022. Retrieved 24 June 2022.
"SARS-CoV-2 sequences by variant". Our World in Data. Archived from the original on 1 May 2022. Retrieved 30 June 2022.
Huang P (20 November 2022). "How monoclonal antibodies lost the fight with new COVID variants". NPR. Archived from the original on 15 August 2023. Retrieved 15 August 2023.
"COVID-19 Vaccine Boosters". U.S. Food and Drug Administration (FDA). 27 September 2022. Archived from the original on 8 October 2022. Retrieved 8 October 2022.
"Moderna COVID-19 Vaccines". U.S. Food and Drug Administration (FDA). 7 October 2022. Archived from the original on 7 October 2022. Retrieved 8 October 2022.
"Pfizer-BioNTech COVID-19 Vaccines". U.S. Food and Drug Administration (FDA). 3 October 2022. Archived from the original on 8 October 2022. Retrieved 8 October 2022.
"Updated COVID-19 Vaccines for Use in the United States Beginning in Fall 2023". U.S. Food and Drug Administration (FDA). 15 June 2023. Archived from the original on 17 June 2023. Retrieved 16 June 2023. This article incorporates text from this source, which is in the public domain.
Recommendation for the 2023-2024 Formula of COVID-19 vaccines in the U.S. (PDF) (Report). U.S. Food and Drug Administration (FDA). 16 June 2023. Archived from the original on 16 June 2023. Retrieved 16 June 2023.
"Updated COVID-19 Vaccines for Use in the United States Beginning in Fall 2024". U.S. Food and Drug Administration (FDA). 5 June 2024. Archived from the original on 18 June 2024. Retrieved 19 June 2024. This article incorporates text from this source, which is in the public domain.
Geddes L (17 December 2021). "How do the symptoms of Omicron differ from previous COVID-19 variants?". GAVI. Archived from the original on 13 December 2022. Retrieved 13 December 2022.
Quann J (7 July 2022). "Luke O'Neill: Night sweats now a sign of BA.5 COVID variant". Newstalk. Archived from the original on 20 July 2022. Retrieved 10 July 2022.
Bawden T (2 August 2022). "New Covid symptoms: Night sweats emerge as common sign of Omicron BA.5 with 1 in 10 suffering hot flushes". i. Archived from the original on 13 December 2022. Retrieved 13 December 2022.
CDC COVID-19 Response Team (December 2021). "SARS-CoV-2 B.1.1.529 (Omicron) Variant - United States, December 1-8, 2021". MMWR. Morbidity and Mortality Weekly Report. 70 (50). Center for Disease Control: 1731–1734. doi:10.15585/mmwr.mm7050e1. PMC 8675659. PMID 34914670. S2CID 245071514. Archived from the original on 20 December 2021. Retrieved 17 December 2021.
Harvard Medical School (6 January 2022). "Coronavirus Resource Center – Harvard Health". Harvard Health Publishing. Archived from the original on 11 January 2022. Retrieved 7 January 2022. Lab studies, animal studies, and epidemiological data all indicate that Omicron may cause less severe disease than previous variants.
"Lung tissue study sheds light on fast Omicron spread". CIDRAP. 15 December 2021. Archived from the original on 16 December 2021. Retrieved 25 December 2021.
"Some reduction in hospitalisation for Omicron v Delta in England: early analysis". Imperial College London. 22 December 2021. Archived from the original on 22 January 2022. Retrieved 22 January 2022.
Parker C (21 January 2022). "Government scientists monitoring new BA.2 variant of Omicron". Yahoo News. Archived from the original on 21 January 2022. Retrieved 21 January 2022.
Larsen JA (21 January 2022). "Ny Omikron-variant tager over i Danmark – det ved vi om den" (in Danish). TV2. Archived from the original on 22 January 2022. Retrieved 21 January 2022.
Berger M (28 November 2021). "South Africa, which found the omicron variant first, leads Africa in coronavirus sequencing". Washington Post. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Sequencing by country". GISAID. 2 December 2021. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
Geddes L (15 December 2021). "How big is the risk of Omicron in the UK and how do we know?". The Guardian. Archived from the original on 21 December 2021. Retrieved 15 December 2021.
"Only one approved rapid test in Australia explicitly states it detects Omicron". the Guardian. 27 January 2022. Archived from the original on 30 January 2022. Retrieved 30 January 2022.
"Post-market review of antigen and rapid antigen tests". Archived from the original on 15 August 2023. Retrieved 15 August 2023.
"STATEMENT MANY RAPID TESTS DETECT OMICRON" (PDF). PEI. 17 August 2022. Archived (PDF) from the original on 16 August 2022. Retrieved 16 August 2022.
"SARS-CoV-2 Viral Mutations: Impact on COVID-19 Tests". FDA. 16 December 2021. Archived from the original on 21 December 2021. Retrieved 16 December 2021.
"SARS-CoV-2 variants of concern and variants under investigation in England" (PDF). Archived (PDF) from the original on 18 December 2021. Retrieved 10 December 2021.
"Variant-PCR-testen (tidl. Delta-PCR-testen)" (in Danish). Statens Serum Institut. 21 December 2021. Archived from the original on 7 February 2021. Retrieved 17 January 2022.
"Status på omikron-varianten (B.1.1.529) pr. 05.12.21" [Status of the Omicron variant (B.1.1.529) per 05.12.21] (in Danish). Statens Serum Institut. Archived from the original on 7 December 2021. Retrieved 18 December 2021.
Sample I, Walker P (7 December 2021). "Scientists find 'stealth' version of Omicron that may be harder to track". www.theguardian.com. Archived from the original on 7 December 2021. Retrieved 7 December 2021.
"Stealth Omicron: What is The Fast Spreading Omicron BA.2 Sub-Variant That Can Escape RT-PCR Test?". india.com. 23 January 2022. Archived from the original on 23 January 2022. Retrieved 23 January 2022.
Rajeshuni, N (26 January 2022). "Scientists monitoring new omicron subvariant BA.2". ABC News. Archived from the original on 1 February 2022. Retrieved 2 February 2022.
"Delta Variant Report". outbreak.info (Scripps Research). 13 December 2021. Archived from the original on 19 December 2021. Retrieved 13 December 2021.
"BA.1 Lineage Report". outbreak.info (Scripps Research). 19 December 2021. Archived from the original on 16 December 2021. Retrieved 19 December 2021.
Zimmer C, Lyons, PJ (24 February 2022). "Is the BA.2 version of Omicron worse? Here's what you need to know". The New York Times. Archived from the original on 12 March 2022. Retrieved 12 March 2022.
"Update on Omicron". World Health Organization. 28 November 2021. Archived from the original on 30 November 2021.
"March 25, 2022 | Important Update". aspr.hhs.gov. Archived from the original on 27 January 2023. Retrieved 6 April 2022.
"Latest confirmed cases of COVID-19 in South Africa (26 November 2021)". National Institute for Communicable Diseases. 26 November 2021. Archived from the original on 4 December 2021.
"Latest confirmed cases of COVID-19 in South Africa (3 December 2021)". National Institute for Communicable Diseases. 3 December 2021. Archived from the original on 4 December 2021.
"Operations Dashboard for ArcGIS". NICD GIS Portal. 28 July 2021. Archived from the original on 8 September 2021. Retrieved 4 September 2024.
"Omicron seems to carry higher Covid reinfection risk, says South Africa". The Guardian. 2 December 2021. Archived from the original on 3 December 2021. Retrieved 3 December 2021.
"'Patience is crucial': Why we won't know for weeks how dangerous Omicron is". www.science.org. Archived from the original on 30 November 2021. Retrieved 30 November 2021.
"Proportion and number of clades by epiweek in South Africa, 2021" (PDF). Network for Genomic Surveillance in South Africa. National Institute for Communicable Diseases. 26 November 2021. Archived (PDF) from the original on 2 December 2021. Retrieved 2 December 2021.
"Omicron becomes dominant variant in South Africa". The Guardian. 2 December 2021. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Risk assessment for SARS-CoV-2 variant: Omicron VOC-21NOV-01 (B.1.1.529): 3 December 2021" (PDF). GOV.UK. Archived (PDF) from the original on 4 December 2021. Retrieved 25 May 2025.
McCarthy K, Rachida S, Yousif M, Ndlovu N, Iwu-Jaja C, Howard W, et al. "Wastewater-based epidemiology for SARS-CoV-2 in South Africa" (PDF). National Institute for Communicable Diseases. Archived (PDF) from the original on 9 November 2021. Retrieved 30 November 2021.
"COVID-19: Toddlers make up 10% of hospital cases in South Africa's Omicron epicentre". gulfnews.com. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"Omicron Spread in South Africa". p. 6. Archived from the original on 4 December 2021. Retrieved 4 December 2021.
Mandavilli A (4 December 2021). "Omicron Variant Spreading Twice as Quickly as Delta in South Africa". The New York Times. ISSN 0362-4331. Archived from the original on 4 December 2021. Retrieved 4 December 2021.
The SARS-CoV-2 variant Omicron: a snapshot of where we are – 08.12.2021, 5 PM CET., 8 December 2021, archived from the original on 21 December 2021, retrieved 10 December 2021
"Prof. Albertsen deliberations". Twitter. Archived from the original on 14 December 2021. Retrieved 11 December 2021.
"SARS-CoV-2 variants of concern and variants under investigation in England – Technical briefing 33" (PDF). gov.uk. UK Health Security Agency. 23 December 2021. Archived (PDF) from the original on 2 January 2022. Retrieved 15 January 2022.
Covid-19 Rapport om omikronvarianten [Status of the SARS-CoV-2 variant Omicron in Denmark] (PDF) (Report) (in Danish). Statens Serum Institut. 20 December 2021. Archived (PDF) from the original on 21 December 2021. Retrieved 21 December 2021.
Ekspertrapport den 17. december 2021 – Scenarier for smittetal og nyindlæggelser med omikronvarianten [Expert report 17 December 2021 – Scenarios for infection numbers and new hospitalizations with the Omicron-variant] (PDF) (Report) (in Danish). Statens Serum Institut. 18 December 2021. Archived (PDF) from the original on 19 December 2021. Retrieved 18 December 2021.
"Variant-PCR svar fra 27. nov. og frem, Testcenter Danmark" (in Danish). Archived from the original on 27 December 2021. Retrieved 27 December 2021.
"Schweiz sitrep". Twitter. 10 December 2021. Archived from the original on 12 December 2021. Retrieved 10 December 2021.
"RKI – Coronavirus SARS-CoV-2 – Wochenbericht vom 13.1.2022" (PDF). www.rki.de. Archived (PDF) from the original on 24 January 2022. Retrieved 13 January 2022.
"Omicron in Scotland – evidence paper". www.gov.scot. Archived from the original on 20 December 2021. Retrieved 11 December 2021.
Wenseleers T (22 December 2021), tomwenseleers/newcovid_belgium, archived from the original on 22 December 2021, retrieved 22 December 2021
"Ontario Dashboard". Ontario COVID-19 Science Advisory Table. Archived from the original on 17 March 2021. Retrieved 12 December 2021.
"COVID Data Tracker". Centers for Disease Control and Prevention. 28 March 2020. Archived from the original on 22 May 2021. Retrieved 21 December 2021.
"Portugal says Omicron dominant, infections rising". NewsNine. 25 December 2021. Archived from the original on 28 December 2021. Retrieved 28 December 2021.
Wenseleers T (20 December 2021), tomwenseleers/newcovid_belgium, archived from the original on 22 December 2021, retrieved 21 December 2021
"Variants of the coronavirus SARS-CoV-2 in the Netherlands". National Institute for Public Health and the Environment. Archived from the original on 11 January 2022. Retrieved 14 January 2022.
"COVID: Omicron accountts for 28% of cases in Italy, will soon be dominant". ANSA.en. 23 December 2021. Archived from the original on 24 December 2021. Retrieved 28 December 2021.
Oppdatert P (8 December 2021). "Statistikk over meldte tilfeller av virusvarianten omikron" (in Norwegian). Folkehelseinstituttet. Archived from the original on 28 December 2021. Retrieved 29 December 2021.
"Covid-19: Omicron is now the dominant variant in France". France24. 31 December 2021. Archived from the original on 3 January 2022. Retrieved 31 December 2021.
"Omicron is now the dominant variant in France". CNN. 31 December 2021. Archived from the original on 31 December 2021. Retrieved 31 December 2021.
"The puzzle of America's record Covid hospital rate". BBC News. 13 January 2022. Archived from the original on 14 January 2022. Retrieved 14 January 2022.
"Tracking of Variants". GISAID. Archived from the original on 23 June 2021. Retrieved 12 January 2022. Updated frequently.
"INDIA WE WILL FIGHT IT TOGETHER". COVID19 India. Archived from the original on 28 December 2021. Retrieved 30 December 2021.
"Ómicron: the Ministry of Health confirmed the first case in Argentina". MRT. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 6 December 2021.
"Covid-19: sulla piattaforma ICoGen 84 sequenze della variante Omicron" [Covid-19: 84 sequences of the Omicron variant on the ICoGen platform] (in Italian). 18 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.
"ISP confirmó 30 casos de la nueva variante Ómicron a nivel nacional". CNN Chile (in Spanish). 16 December 2021. Archived from the original on 16 December 2021. Retrieved 19 December 2021.
"Portugal tem 38 casos da variante ómicron. Cuidados intensivos com "tendência fortemente crescente"" [Portugal has 38 cases of the omicron variant. Intensive care shows "strongly increasing trend"]. Público. 3 December 2021. Archived from the original on 4 December 2021. Retrieved 4 December 2021.
"Monitorização das linhas vermelhas para a COVID-19" [Monitoring of red lines for COVID-19] (PDF). INSA (in Portuguese). National Health Service of Portugal. 3 December 2021. p. 14. Archived (PDF) from the original on 4 December 2021. Retrieved 7 December 2021.
"Zimbabwe says country has identified 50 cases of Omicron". Reuters. Johannesburg. 3 December 2021. Archived from the original on 3 December 2021. Retrieved 3 December 2021.
"Omicron confirmed in nine African countries, say officials". ABC News. Archived from the original on 7 December 2021. Retrieved 7 December 2021.
"Namibia detects Omicron coronavirus variant in 18 of 19 samples". Reuters. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 7 December 2021.
"Senegal records first Omicron case in tourist who attended demonstration". Reuters. 5 December 2021. Archived from the original on 5 December 2021. Retrieved 5 December 2021.
"Latvia gets its first two Omicron cases". Public Broadcasting of Latvia. Reuters. 6 December 2021. Archived from the original on 6 December 2021. Retrieved 6 December 2021.
"Koronavirus ONLINE: Válek smetl povinné očkování 60+. A 5982 případů za sobotu v ČR". Blesk.cz (in Czech). Archived from the original on 20 December 2021. Retrieved 20 December 2021.
"Omicron confirmed in all Slovenian regions but one". Slovenia Times. 21 December 2021. Archived from the original on 22 December 2021. Retrieved 22 December 2021.
"Two confirmed cases of Omicron variant in quarantine". Fiji Broadcasting Corporation. Archived from the original on 6 December 2021. Retrieved 6 December 2021.
"Saudi Arabia detects first case of COVID-19 Omicron variant in Kingdom". Al Arabiya English. December 2021. Archived from the original on 1 December 2021. Retrieved 1 December 2021.
"Tunisia records first case of omicron variant". Arab News. 3 December 2021. Archived from the original on 8 December 2021. Retrieved 5 December 2021.
Mukherjee, Promit; Hunnicutt, Trevor (1 December 2021). "Omicron rapidly dominating in South Africa; U.S. reports first case". Reuters. Archived from the original on 2 December 2021. Retrieved 2 December 2021.
"В Україні виявили штам "Омікрон"" [Omicron strain found in Ukraine]. Ukrainian Ministry of Health (in Ukrainian). 18 December 2021. Archived from the original on 20 December 2021. Retrieved 20 December 2021.

webmd.com (Global: 1,169^th place; English: 1,075^th place)

O'Mary L (11 April 2023). "New COVID Variant on WHO's Radar Causing Itchy Eyes in Kids". WebMD. Archived from the original on 10 May 2023. Retrieved 16 April 2023.

whn.global (Global: low place; English: low place)

"🛑 Public Health Alert: NB.1.8.1 Variant Spreading Across Asia and Beyond". WHN. 3 June 2025. Retrieved 9 June 2025.

who.int (Global: 195^th place; English: 302^nd place)

who.int

"Statement on the update of WHO's working definitions and tracking system for SARS-CoV-2 variants of concern and variants of interest" (Statement). World Health Organization. 16 March 2023. Archived from the original on 8 June 2023. Retrieved 20 May 2023.
"Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern". World Health Organization (WHO). 26 November 2021. Archived from the original on 26 November 2021.
"Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern". World Health Organization. 26 November 2021. Archived from the original on 26 November 2021. Retrieved 26 November 2021.
"COVID-19 Weekly Epidemiological Update, Edition 77" (PDF). World Health Organization. 1 February 2022. Archived (PDF) from the original on 3 February 2022. Retrieved 2 February 2022.
"COVID-19 Weekly Epidemiological Update, Edition 82". World Health Organization. 8 March 2022. Archived from the original on 13 March 2022. Retrieved 12 March 2022.
"COVID-19 Weekly Epidemiological Update, Edition 84". World Health Organization. 22 March 2022. Archived from the original on 26 March 2022. Retrieved 25 March 2022.
"COVID-19 Weekly Epidemiological Update, Edition 80". World Health Organization. 22 February 2022. Archived from the original on 10 March 2022. Retrieved 12 March 2022.
"Enhancing response to Omicron SARS-CoV-2 variant: Technical brief and priority actions for Member States" (PDF). World Health Organization. 21 January 2022. Archived (PDF) from the original on 27 January 2022. Retrieved 24 January 2022.
"Tracking SARS-CoV-2 variants". World Health Organization (WHO). Archived from the original on 9 June 2021. Retrieved 15 July 2022.
"Tracking SARS-CoV-2 variants". World Health Organization (WHO). Archived from the original on 3 February 2023. Retrieved 22 August 2023.
"EG.5 Initial Risk Evaluation, 9 August 2023" (PDF). World Health Organization. 9 August 2023. Archived (PDF) from the original on 7 December 2023. Retrieved 11 August 2023.
"Tracking SARS-CoV-2 variants". World Health Organization. 17 August 2023. Retrieved 30 August 2023.
"WHO TAG-VE Risk Evaluation for SARS-CoV-2 Variant Under Monitoring: XFG" (PDF). World Health Organization. Retrieved 25 July 2025.
"Statement on the antigen composition of COVID-19 vaccines". World Health Organization (WHO) (Press release). 15 May 2025. Retrieved 16 May 2025.
"Update on Omicron". World Health Organization. 28 November 2021. Archived from the original on 30 November 2021.

data.who.int

"WHO Coronavirus Network (CoViNet)". Retrieved 1 September 2024.
"Global COVID-19 Overview | WHO COVID-19 dashboard".

wikidata.org (Global: 43^rd place; English: 161^st place)

Nathan Bartlett (9 July 2024). "From FLiRT to FLuQE: what to know about the latest COVID variants on the rise". The Conversation. ISSN 2431-2134. Wikidata Q127329080. Archived from the original on 10 July 2024.

wikipedia.org (Global: low place; English: low place)

es.wikipedia.org

"Distribución de casos por las VOC delta - ómicron" [Distribution of cases by VOC Delta - Omicron]. National Institute of Health (Peru) [es] (in Spanish). 18 July 2022. Retrieved 31 July 2022.

wionews.com (Global: 2,596^th place; English: 1,437^th place)

"Austria detects suspect Omicron case as Europe battles virus surge". WION. 28 November 2021. Archived from the original on 28 November 2021. Retrieved 28 November 2021.

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

Patel V (27 November 2021). "How Omicron, the New Covid-19 Variant, Got Its Name". The New York Times. ISSN 0362-4331. Archived from the original on 28 November 2021. Retrieved 28 November 2021.
Zimmer B (2 December 2021). "'Omicron': Greek's 'Little O' Will Loom Larger Now". Wall Street Journal. ISSN 0099-9660. Archived from the original on 3 December 2021. Retrieved 23 December 2021. President Joe Biden stumbled over the pronunciation in a press conference on Monday, calling the variant "omnicron" with an extra "n" sound. It has also been frequently misspelled that way online. The confusion is understandable, since we're more familiar with words that have the Latin prefix "omni-" meaning "all," as in "omnipresent" or "omnivore."
Wannigama, Dhammika Leshan; Amarasiri, Mohan; Phattharapornjaroen, Phatthranit; Hurst, Cameron; Modchang, Charin; Chadsuthi, Sudarat; et al. (4 March 2024). "Wastewater-based epidemiological surveillance of SARS-CoV-2 new variants BA.2.86 and offspring JN.1 in south and Southeast Asia". Journal of Travel Medicine. doi:10.1093/jtm/taae040. ISSN 1195-1982.
Hassan A (28 June 2022). "The Omicron subvariants BA.4 and BA.5 have together become dominant in the U.S., the C.D.C. estimates". The New York Times. ISSN 0362-4331. Archived from the original on 29 June 2022. Retrieved 28 June 2022.
"New COVID variant NB.1.8.1 found in the UK: What are the symptoms?". The Times of India. 6 June 2025. ISSN 0971-8257. Retrieved 9 June 2025.
Nathan Bartlett (9 July 2024). "From FLiRT to FLuQE: what to know about the latest COVID variants on the rise". The Conversation. ISSN 2431-2134. Wikidata Q127329080. Archived from the original on 10 July 2024.
Kaku, Yu; Okumura, Kaho; Kawakubo, Shusuke; Uriu, Keiya; Chen, Luo; Kosugi, Yusuke; et al. (1 December 2024). "Virological characteristics of the SARS-CoV-2 XEC variant". The Lancet. 24 (12): e736. doi:10.1016/S1473-3099(24)00731-X. ISSN 1473-3099. PMID 39521009. Retrieved 25 July 2025.
Guo, Caiwan; Yu, Yuanling; Liu, Jingyi; Jian, Fanchong; Yang, Sijie; Song, Weiliang; et al. (1 July 2025). "Antigenic and virological characteristics of SARS-CoV-2 variants BA.3.2, XFG, and NB.1.8.1". The Lancet. 25 (7): e374 – e377. doi:10.1016/S1473-3099(25)00308-1. ISSN 1473-3099. PMID 40484018. Retrieved 25 July 2025.
"Israeli trial, world's first, finds 4th dose 'not good enough' against Omicron". The Times of Israel. 18 January 2022. ISSN 0040-7909. Archived from the original on 30 March 2022. Retrieved 11 April 2022.
Wee LE, Lim JT, Tay AT, Chiew CJ, Ong B, Lye DC, et al. (30 August 2024). "Autoimmune Sequelae After Delta or Omicron Variant SARS-CoV-2 Infection in a Highly Vaccinated Cohort". JAMA Network Open. 7 (8) e2430983. doi:10.1001/jamanetworkopen.2024.30983. ISSN 2574-3805. PMC 11364997. PMID 39212988.
Antonelli M, Pujol JC, Spector TD, Ourselin S, Steves CJ (June 2022). "Risk of long COVID associated with delta versus omicron variants of SARS-CoV-2". The Lancet. 399 (10343): 2263–2264. doi:10.1016/S0140-6736(22)00941-2. ISSN 0140-6736. PMC 9212672. PMID 35717982.
Mandavilli A (4 December 2021). "Omicron Variant Spreading Twice as Quickly as Delta in South Africa". The New York Times. ISSN 0362-4331. Archived from the original on 4 December 2021. Retrieved 4 December 2021.
"Omicron variant more resistant to vaccine but causes less severe covid, major South African study concludes". Washington Post. ISSN 0190-8286. Retrieved 16 December 2021. Later information provided by a Discovery Health spokeswoman put the number of total cases at 78,173, of which 19,070 tests were positive during the "omicron period" from Nov. 15 to Dec. 7.
"Variant Omicron: premiers cas détectés en Guadeloupe et à Saint-Martin" [Omicron variant: first cases detected in Guadeloupe and Saint-Martin]. SudOuest (in French). 18 December 2021. ISSN 1760-6454. Retrieved 10 January 2022.

wsj.com (Global: 79^th place; English: 65^th place)

Zimmer B (2 December 2021). "'Omicron': Greek's 'Little O' Will Loom Larger Now". Wall Street Journal. ISSN 0099-9660. Archived from the original on 3 December 2021. Retrieved 23 December 2021. President Joe Biden stumbled over the pronunciation in a press conference on Monday, calling the variant "omnicron" with an extra "n" sound. It has also been frequently misspelled that way online. The confusion is understandable, since we're more familiar with words that have the Latin prefix "omni-" meaning "all," as in "omnipresent" or "omnivore."

x.com (Global: low place; English: low place)

@BNODesk (26 November 2021). "Statement from Israel's health ministry reporting 1 confirmed case of new coronavirus variant B.1.1.529" (Tweet). Retrieved 26 November 2021 – via Twitter.
@Tuliodna (11 April 2022). "New Omicron BA.4 & BA.5 detected in South Africa, Botswana, Belgium, Germany, Denmark, and U.K. Early indications that these new sublineages are increasing as a share of genomically confirmed cases in SA" (Tweet) – via Twitter.
@IsraelMOH (25 December 2021). "היום, 25/12/2021 זוהו 591 מאומתים חדשים" [Today, 25/12/2021, 591 new verified people were identified] (Tweet) (in Hebrew) – via Twitter.
Ministerio de Salud [@ministeriosalud] (3 January 2022). "'Tenemos 684 casos #ómicron en todo el país. De ellos, 661 corresponden a viajeros, 14 casos positivos con nexo de viajeros y 9 son los casos comunitarios, estos últimos, todos en la región Metropolitana'" ['We have 684 #omicron cases nationwide. Of these, 661 correspond to travelers, 14 positive cases connected to travelers and 9 are community cases, the latter, all in the Metropolitan region.'] (Tweet) (in Spanish). Retrieved 4 January 2022 – via Twitter.
@MOH_Kenya (18 December 2021). "Twenty-seven sequences (77%) were confirmed to belong to the newly identified Omicron variant of concern" (Tweet). Retrieved 20 December 2021 – via Twitter.
Ministry of Health - Uganda [@@MinofHealthUG] (18 December 2021). "PRESS RELEASE: Update on Omicron Variant in #Uganda" (Tweet). Uganda. Retrieved 19 December 2021 – via Twitter.
@MinSaludCol (20 December 2021). "¡ATENCIÓN! Se confirma la presencia de la variante Ómicron en Colombia" (Tweet). Retrieved 21 December 2021 – via Twitter.

xinhuanet.com (Global: 309^th place; English: 660^th place)

"Uzbekistan reports first Omicron case, tightens pandemic restrictions-Xinhua". xinhuanet.com. Retrieved 10 February 2022.

yahoo.com (Global: 38^th place; English: 40^th place)

uk.news.yahoo.com

Leventis Lourgos, Angie (9 May 2024). "New COVID 'FLiRT' variants are spreading nationwide. Chicago health experts urge up to date vaccination". Yahoo News. Retrieved 14 May 2024 – via Chicago Tribune.
Parker C (21 January 2022). "Government scientists monitoring new BA.2 variant of Omicron". Yahoo News. Archived from the original on 21 January 2022. Retrieved 21 January 2022.

yalemedicine.org (Global: low place; English: low place)

"3 Things to Know About XEC, the Dominant COVID Strain". Yale Medicine. Retrieved 25 July 2025.

yle.fi (Global: 380^th place; English: 933^rd place)

"THL ja STM: Etelä-Suomessa lähes kaikki tapaukset omikronia". Yle Uutiset (in Finnish). 5 January 2022. Retrieved 6 January 2022.

yna.co.kr (Global: 981^st place; English: 1,020^th place)

en.yna.co.kr

고병준 (3 January 2022). "(2nd LD) Daily virus cases stay below 4,000 for 2nd straight day amid tighter antivirus curbs". Yonhap News Agency. Retrieved 4 January 2022.

ynet.co.il (Global: 382^nd place; English: 2,127^th place)

m.ynet.co.il

ינקו, אדיר; שומפלבי, אטילה (26 November 2021). "מחוסנת ב-3 מנות ואישה שנסעה לאילת באוטובוס: המאומתים לזן החדשt". Ynet (in Hebrew). Archived from the original on 27 November 2021. Retrieved 28 November 2021. "4 מאומתים לווריאנט החדש התגלו בארץ, רה"מ יקיים מסיבת עיתונאים ב-14:30" translated: "4 verified for the new variant were discovered in the country, the prime minister will hold a press conference at 14:30

youtube.com (Global: 9^th place; English: 13^th place)

The SARS-CoV-2 variant Omicron: a snapshot of where we are – 08.12.2021, 5 PM CET., 8 December 2021, archived from the original on 21 December 2021, retrieved 10 December 2021

ziaruldeiasi.ro (Global: low place; English: low place)

""Omicron" a pus stăpânire pe Iaşi: 29 la 0! La ATI sunt numai nevaccinati" ["Omicron" took over Iaşi: 29 to 0! In the ICU, there are only the unvaccinated]. ziaruldeiasi.ro. Retrieved 10 January 2022. 29 din 29 confirmaţi... [29 out of 29 confirmed...]

SARS-CoV-2 Omicron variant (English Wikipedia)

aa.com.tr (Global: 754th place; English: 1,313th place)

abc.net.au (Global: 139th place; English: 108th place)

abc13.com (Global: 5,780th place; English: 3,118th place)

abs-cbn.com (Global: 528th place; English: 303rd place)

news.abs-cbn.com

admin.ch (Global: 279th place; English: 551st place)

covid19.admin.ch

aftonbladet.se (Global: 532nd place; English: 847th place)

ages.at (Global: low place; English: low place)

alarabiya.net (Global: 598th place; English: 1,085th place)

english.alarabiya.net

albaniandailynews.com (Global: low place; English: low place)

aljazeera.com (Global: 268th place; English: 215th place)

ami.mr (Global: low place; English: low place)

fr.ami.mr

angop.ao (Global: low place; English: low place)

aninews.in (Global: 2,615th place; English: 1,406th place)

ansa.it (Global: 493rd place; English: 1,932nd place)

arab.news (Global: 6,427th place; English: 3,981st place)

archive.today (Global: 14th place; English: 14th place)

as.com (Global: 229th place; English: 502nd place)

en.as.com

associatestimes.com (Global: low place; English: low place)

azernews.az (Global: low place; English: 9,225th place)

bbc.co.uk (Global: 8th place; English: 10th place)

bbc.com (Global: 20th place; English: 30th place)

biorxiv.org (Global: 5,061st place; English: 5,698th place)

bjnews.com.cn (Global: 1,192nd place; English: 4,736th place)

blesk.cz (Global: 3,415th place; English: 8,799th place)

bm.ge (Global: low place; English: low place)

bna.bh (Global: low place; English: low place)

bt.dk (Global: 2,786th place; English: 3,751st place)

canada.ca (Global: 1,712th place; English: 1,063rd place)

caribbeannationalweekly.com (Global: low place; English: low place)

cbc.ca (Global: 115th place; English: 82nd place)

cbslocal.com (Global: 680th place; English: 412th place)

baltimore.cbslocal.com

cbsnews.com (Global: 108th place; English: 80th place)

cdc.gov (Global: 218th place; English: 212th place)

cdc.gov

covid.cdc.gov

cdgn.org.au (Global: low place; English: low place)

channelnewsasia.com (Global: 1,127th place; English: 691st place)

charite.de (Global: low place; English: low place)

chinanews.com.cn (Global: 2,979th place; English: low place)

chronicle.gi (Global: low place; English: low place)

cnbc.com (Global: 220th place; English: 155th place)

cnn.com (Global: 28th place; English: 26th place)

cnn.com

cnnespanol.cnn.com

edition.cnn.com

cnnbrasil.com.br (Global: 3,706th place; English: 7,768th place)

cnnchile.com (Global: 9,282nd place; English: low place)

cnnindonesia.com (Global: 1,737th place; English: 2,788th place)

cnnphilippines.com (Global: 2,993rd place; English: 1,624th place)

cov-lineages.org (Global: low place; English: low place)

covariants.org (Global: low place; English: low place)

covid19-sciencetable.ca (Global: low place; English: low place)

covid19genomics.dk (Global: low place; English: low place)

ctvnews.ca (Global: 768th place; English: 482nd place)

ctvnews.ca

montreal.ctvnews.ca

cubitanow.com (Global: low place; English: low place)

noticias.cubitanow.com

cyprus-mail.com (Global: 6,937th place; English: 4,863rd place)

dailyfinland.fi (Global: low place; English: low place)

deseret.com (Global: 1,230th place; English: 680th place)

digi24.ro (Global: 6,342nd place; English: 7,298th place)

doi.org (Global: 2nd place; English: 2nd place)

downtoearth.org.in (Global: low place; English: 6,403rd place)

drive.google.com (Global: 1,343rd place; English: 1,354th place)

dw.com (Global: 204th place; English: 353rd place)

ebc.com.br (Global: 2,752nd place; English: 6,664th place)

agenciabrasil.ebc.com.br

eklinika.rs (Global: low place; English: low place)

ekstrabladet.dk (Global: 3,663rd place; English: 5,480th place)

elpais.com (Global: 84th place; English: 370th place)

euronews.com (Global: 612th place; English: 921st place)

europa.eu (Global: 68th place; English: 117th place)

aa.com.tr (Global: 754^th place; English: 1,313^th place)

abc.net.au (Global: 139^th place; English: 108^th place)

abc13.com (Global: 5,780^th place; English: 3,118^th place)

abs-cbn.com (Global: 528^th place; English: 303^rd place)

admin.ch (Global: 279^th place; English: 551^st place)

aftonbladet.se (Global: 532^nd place; English: 847^th place)

alarabiya.net (Global: 598^th place; English: 1,085^th place)

aljazeera.com (Global: 268^th place; English: 215^th place)

aninews.in (Global: 2,615^th place; English: 1,406^th place)

ansa.it (Global: 493^rd place; English: 1,932^nd place)

arab.news (Global: 6,427^th place; English: 3,981^st place)

archive.today (Global: 14^th place; English: 14^th place)

as.com (Global: 229^th place; English: 502^nd place)

azernews.az (Global: low place; English: 9,225^th place)

bbc.co.uk (Global: 8^th place; English: 10^th place)

bbc.com (Global: 20^th place; English: 30^th place)

biorxiv.org (Global: 5,061^st place; English: 5,698^th place)

bjnews.com.cn (Global: 1,192^nd place; English: 4,736^th place)

blesk.cz (Global: 3,415^th place; English: 8,799^th place)

bt.dk (Global: 2,786^th place; English: 3,751^st place)

canada.ca (Global: 1,712^th place; English: 1,063^rd place)

cbc.ca (Global: 115^th place; English: 82^nd place)

cbslocal.com (Global: 680^th place; English: 412^th place)

cbsnews.com (Global: 108^th place; English: 80^th place)

cdc.gov (Global: 218^th place; English: 212^th place)

channelnewsasia.com (Global: 1,127^th place; English: 691^st place)

chinanews.com.cn (Global: 2,979^th place; English: low place)

cnbc.com (Global: 220^th place; English: 155^th place)

cnn.com (Global: 28^th place; English: 26^th place)

cnnbrasil.com.br (Global: 3,706^th place; English: 7,768^th place)

cnnchile.com (Global: 9,282^nd place; English: low place)

cnnindonesia.com (Global: 1,737^th place; English: 2,788^th place)

cnnphilippines.com (Global: 2,993^rd place; English: 1,624^th place)

ctvnews.ca (Global: 768^th place; English: 482^nd place)

cyprus-mail.com (Global: 6,937^th place; English: 4,863^rd place)

deseret.com (Global: 1,230^th place; English: 680^th place)

digi24.ro (Global: 6,342^nd place; English: 7,298^th place)

doi.org (Global: 2^nd place; English: 2^nd place)

downtoearth.org.in (Global: low place; English: 6,403^rd place)

drive.google.com (Global: 1,343^rd place; English: 1,354^th place)

dw.com (Global: 204^th place; English: 353^rd place)

ebc.com.br (Global: 2,752^nd place; English: 6,664^th place)

ekstrabladet.dk (Global: 3,663^rd place; English: 5,480^th place)

elpais.com (Global: 84^th place; English: 370^th place)

euronews.com (Global: 612^th place; English: 921^st place)

europa.eu (Global: 68^th place; English: 117^th place)

express.co.uk (Global: 402^nd place; English: 279^th place)

facebook.com (Global: 77^th place; English: 111^th place)

fda.gov (Global: 447^th place; English: 338^th place)

focus.de (Global: 460^th place; English: 2,405^th place)

focustaiwan.tw (Global: 3,164^th place; English: 2,032^nd place)

forbes.com (Global: 54^th place; English: 48^th place)

fortune.com (Global: 433^rd place; English: 284^th place)

fr.de (Global: 1,508^th place; English: 7,002^nd place)

france24.com (Global: 481^st place; English: 508^th place)

francetvinfo.fr (Global: 363^rd place; English: 1,663^rd place)

freepressjournal.in (Global: 1,265^th place; English: 679^th place)

geo.tv (Global: 2,505^th place; English: 1,370^th place)

github.com (Global: 383^rd place; English: 320^th place)

globalnews.ca (Global: 985^th place; English: 583^rd place)

globo.com (Global: 62^nd place; English: 304^th place)

gmanetwork.com (Global: 824^th place; English: 488^th place)

go.com (Global: 48^th place; English: 39^th place)

gov.hu (Global: 7,700^th place; English: low place)

gov.scot (Global: 7,387^th place; English: 4,467^th place)

gov.si (Global: 4,607^th place; English: 6,416^th place)

gulfnews.com (Global: 765^th place; English: 523^rd place)

handle.net (Global: 102^nd place; English: 76^th place)

harvard.edu (Global: 18^th place; English: 17^th place)

hhs.gov (Global: 5,973^rd place; English: 3,693^rd place)

imperial.ac.uk (Global: 7,025^th place; English: 4,914^th place)

independent.co.uk (Global: 36^th place; English: 33^rd place)

independent.ie (Global: 315^th place; English: 209^th place)

india.com (Global: 385^th place; English: 234^th place)

indiatimes.com (Global: 17^th place; English: 15^th place)

inews.co.uk (Global: 1,084^th place; English: 617^th place)

isna.ir (Global: 422^nd place; English: 5,832^nd place)