Neutralization of Omicron sublineages and Deltacron SARS-CoV-2 by three doses of BNT162b2 vaccine or BA.1 infection

Chaitanya Kurhade, Jing Zou, Hongjie Xia, Mingru Liu, Qi Yang, Mark Cutler, David Cooper, Alexander Muik, Ugur Sahin, Kathrin U. Jansen, Ping Ren, Xuping Xie, Kena A. Swanson, Pei-Yong Shi

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Distinct SARS-CoV-2 Omicron sublineages have evolved showing increased fitness and immune evasion than the original Omicron variant BA.1. Here, we report the neutralization activity of sera from BNT162b2 vaccinated individuals or unimmunized Omicron BA.1-infected individuals against Omicron sublineages and “Deltacron” variant (XD). BNT162b2 post-dose 3 immune sera neutralized USA-WA1/2020, Omicron BA.1-, BA.2-, BA.2.12.1-, BA.3-, BA.4/5-, and XD-spike SARS-CoV-2s with geometric mean titres (GMTs) of 1335, 393, 298, 315, 216, 103, and 301, respectively; thus, BA.4/5 SARS-CoV-2 spike variant showed the highest propensity to evade vaccine neutralization compared to the original Omicron variants BA.1. BA.1-convalescent sera neutralized USA-WA1/2020, BA.1-, BA.2-, BA.2.12.1-, BA.3-, BA.4/5-, and Deltacron-spike SARS-CoV-2s with GMTs of 15, 430, 110, 109, 102, 25, and 284, respectively. The unique mutation F486V in the BA.4/5 spike contributes to the increased evasion of antibody neutralization by sublineage BA.4/5. The low neutralization titres of vaccinated sera or convalescent sera from BA.1 infected individuals against the emerging and rapidly spreading Omicron BA.4/5 variants provide important results for consideration in the selection of an updated vaccine in the current Omicron wave. Trial registration:; identifier: NCT04368728.

Original languageEnglish (US)
Pages (from-to)1828-1832
Number of pages5
JournalEmerging Microbes and Infections
Issue number1
StatePublished - Dec 31 2022


  • BNT162b2 vaccine
  • Omicron
  • SARS-CoV-2
  • neutralization
  • variants

ASJC Scopus subject areas

  • Epidemiology
  • Parasitology
  • Microbiology
  • Immunology
  • Drug Discovery
  • Infectious Diseases
  • Virology


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