«Variants: distribution of cases data». GOV.UK. 28. januar 2021. At "Differences between a Variant of Concern and Variant Under Investigation". Besøkt 19. februar 2021. «SARS-CoV-2 variants, if considered to have concerning epidemiological, immunological, or pathogenic properties, are raised for formal investigation. At this point they are designated Variant Under Investigation (VUI) with a year, month, and number. Following a risk assessment with the relevant expert committee, they may be designated Variant of Concern (VOC)»
