Variants of SARS-CoV-2 (English Wikipedia)
Analysis of information sources in references of the Wikipedia article "Variants of SARS-CoV-2" in English language version.
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We detected in total 65776 variants with 5775 distinct variants.
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We therefore generated pseudoviruses that carried the B.1.1.7 spike mutations with or without the additional E484K substitution and tested these against sera obtained after the first and second dose of the BNT162b2 mRNA vaccine as well as against convalescent sera. After the second vaccine dose, we observed a considerable loss of neutralising activity for the pseudovirus with the B.1.1.7 spike mutations and E484K (Fig. 3d, e). The mean fold change for the E484K-containing B.1.1.7 spike variant was 6.7 compared with 1.9 for the B.1.1.7 variant, relative to the wild-type spike protein (Fig. 3a–c and Extended Data Fig. 5). Similarly, when we tested a panel of convalescent sera with a range of neutralisation titres (Fig. 1f, g and Extended Data Fig. 5), we observed additional loss of activity against the mutant B.1.1.7 spike with E484K, with fold change of 11.4 relative to the wild-type spike protein (Fig. 3f, g and Extended Data Fig. 5).
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an emergent Asp614→Gly (D614G) substitution in the spike glycoprotein of SARS-CoV-2 strains that is now the most prevalent form globally
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We detected in total 65776 variants with 5775 distinct variants.
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We therefore generated pseudoviruses that carried the B.1.1.7 spike mutations with or without the additional E484K substitution and tested these against sera obtained after the first and second dose of the BNT162b2 mRNA vaccine as well as against convalescent sera. After the second vaccine dose, we observed a considerable loss of neutralising activity for the pseudovirus with the B.1.1.7 spike mutations and E484K (Fig. 3d, e). The mean fold change for the E484K-containing B.1.1.7 spike variant was 6.7 compared with 1.9 for the B.1.1.7 variant, relative to the wild-type spike protein (Fig. 3a–c and Extended Data Fig. 5). Similarly, when we tested a panel of convalescent sera with a range of neutralisation titres (Fig. 1f, g and Extended Data Fig. 5), we observed additional loss of activity against the mutant B.1.1.7 spike with E484K, with fold change of 11.4 relative to the wild-type spike protein (Fig. 3f, g and Extended Data Fig. 5).
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Within this plausible region of parameter space, P.1 can be between 1.7 and 2.4 times more transmissible (50% BCI, 2.0 median, with a 99% posterior probability of being >1) than local non-P1 lineages and can evade 21 to 46% (50% BCI, 32% median, with a 95% posterior probability of being able to evade at least 10%) of protective immunity elicited by previous infection with non-P.1 lineages, corresponding to 54 to 79% (50% BCI, 68% median) cross-immunity ... We estimate that infections are 1.2 to 1.9 times more likely (50% BCI, median 1.5, 90% posterior probability of being >1) to result in mortality in the period after the emergence of P.1, compared with before, although posterior estimates of this relative risk are also correlated with inferred cross-immunity. More broadly, the recent epidemic in Manaus has strained the city's health care system, leading to inadequate access to medical care. We therefore cannot determine whether the estimated increase in relative mortality risk is due to P.1 infection, stresses on the Manaus health care system, or both. Detailed clinical investigations of P.1 infections are needed.
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an emergent Asp614→Gly (D614G) substitution in the spike glycoprotein of SARS-CoV-2 strains that is now the most prevalent form globally
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