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Characterizing SARS-CoV-2 neutralization profiles after bivalent boosting using antigenic cartography.

Published version
Peer-reviewed

Repository DOI


Type

Article

Change log

Abstract

Since emergence of the initial SARS-CoV-2 BA.1, BA.2 and BA.5 variants, Omicron has diversified substantially. Antigenic characterization of these new variants is important to analyze their potential immune escape from population immunity and implications for future vaccine composition. Here, we describe an antigenic map based on human single-exposure sera and live-virus isolates that includes a broad selection of recently emerged Omicron variants such as BA.2.75, BF.7, BQ, XBB and XBF variants. Recent Omicron variants clustered around BA.1 and BA.5 with some variants further extending the antigenic space. Based on this antigenic map we constructed antibody landscapes to describe neutralization profiles after booster immunization with bivalent mRNA vaccines based on ancestral virus and either BA.1 or BA.4/5. Immune escape of BA.2.75, BQ, XBB and XBF variants was also evident in bivalently boosted individuals, however, cross-neutralization was improved for those with hybrid immunity. Our results indicate that future vaccine updates are needed to induce cross-neutralizing antibodies against currently circulating variants.

Description

Keywords

Humans, SARS-CoV-2, COVID-19, Antibodies, Broadly Neutralizing Antibodies, Vaccines, Combined

Journal Title

Nat Commun

Conference Name

Journal ISSN

2041-1723
2041-1723

Volume Title

14

Publisher

Springer Science and Business Media LLC
Sponsorship
National Institutes of Health (NIH) (via Mount Sinai School of Medicine (MSSM)) (0258-B504-4612)
National Institutes of Health (NIH) (via Mount Sinai School of Medicine (MSSM)) (Option 18B)