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Mapping the antigenic diversification of SARS-CoV-2

van der Straten, K.; Guerra, D.; van Gils, M.; Bontjer, I.; Caniels, T. G.; van Willigen, H. D.; Wynberg, E.; Poniman, M.; Burger, J. A.; Bouhuijs, J. H.; Lavell, A.; Appelman, B.; Sikkens, J. J.; Bomers, M.; Han, A. X.; Nichols, B. E.; Prins, M.; Vennema, H.; Reusken, C.; Eggink, D.; de Jong, M.; de Bree, G. J.; Russell, C. A.; Sanders, R. W.

2022-01-03 infectious diseases
10.1101/2022.01.03.21268582 medRxiv
Show abstract

Large-scale vaccination campaigns have prevented countless hospitalizations and deaths due to COVID-19. However, the emergence of SARS-CoV-2 variants that escape from immunity challenges the effectiveness of current vaccines. Given this continuing evolution, an important question is when and how to update SARS-CoV-2 vaccines to antigenically match circulating variants, similar to seasonal influenza viruses where antigenic drift necessitates periodic vaccine updates. Here, we studied SARS-CoV-2 antigenic drift by assessing neutralizing activity against variants-of-concern (VOCs) of a unique set of sera from patients infected with a range of VOCs. Infections with D614G or Alpha strains induced the broadest immunity, while individuals infected with other VOCs had more strain-specific responses. Omicron BA.1 and BA.2 were substantially resistant to neutralization by sera elicited by all other variants. Antigenic cartography revealed that Omicron BA.1 and BA.2 are antigenically most distinct from D614G, associated with immune escape and likely requiring vaccine updates to ensure vaccine effectiveness.

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