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mRNA-based COVID-19 vaccine boosters induce neutralizing immunity against SARS-CoV-2 Omicron variant

  • Wilfredo F. Garcia-Beltran
  • , Kerri J. St. Denis
  • , Angelique Hoelzemer
  • , Evan C. Lam
  • , Adam D. Nitido
  • , Maegan L. Sheehan
  • , Cristhian Berrios
  • , Onosereme Ofoman
  • , Christina C. Chang
  • , Blake M. Hauser
  • , Jared Feldman
  • , Alex L. Roederer
  • , David J. Gregory
  • , Mark C. Poznansky
  • , Aaron G. Schmidt
  • , A. John Iafrate
  • , Vivek Naranbhai
  • , Alejandro B. Balazs

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Recent surveillance has revealed the emergence of the SARS-CoV-2 Omicron variant (BA.1/B.1.1.529) harboring up to 36 mutations in spike protein, the target of neutralizing antibodies. Given its potential to escape vaccine-induced humoral immunity, we measured the neutralization potency of sera from 88 mRNA-1273, 111 BNT162b, and 40 Ad26.COV2.S vaccine recipients against wild-type, Delta, and Omicron SARS-CoV-2 pseudoviruses. We included individuals that received their primary series recently (<3 months), distantly (6–12 months), or an additional “booster” dose, while accounting for prior SARS-CoV-2 infection. Remarkably, neutralization of Omicron was undetectable in most vaccinees. However, individuals boosted with mRNA vaccines exhibited potent neutralization of Omicron, only 4–6-fold lower than wild type, suggesting enhanced cross-reactivity of neutralizing antibody responses. In addition, we find that Omicron pseudovirus infects more efficiently than other variants tested. Overall, this study highlights the importance of additional mRNA doses to broaden neutralizing antibody responses against highly divergent SARS-CoV-2 variants.

Original languageEnglish
Pages (from-to)457-466.e4
Number of pages15
JournalCell
Volume185
Issue number3
DOIs
Publication statusPublished - 3 Feb 2022

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • breadth
  • COVID-19
  • Delta
  • infectivity
  • neutralizing antibodies
  • Omicron
  • SARS-CoV-2
  • spike
  • vaccination
  • variants

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