Immune boosting by B.1.1.529 (Omicron) depends on previous SARS-CoV-2 exposure

COVIDsortium Investigators, COVIDsortium Immune Correlates Network, João B. Augusto

Resultado de pesquisarevisão de pares

240 Citações (Scopus)

Resumo

The Omicron, or Pango lineage B.1.1.529, variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) carries multiple spike mutations with high transmissibility and partial neutralizing antibody (nAb) escape. Vaccinated individuals show protection against severe disease, often attributed to primed cellular immunity. We investigated T and B cell immunity against B.1.1.529 in triple BioNTech BNT162b2 messenger RNA-vaccinated health care workers (HCWs) with different SARS-CoV-2 infection histories. B and T cell immunity against previous variants of concern was enhanced in triple-vaccinated individuals, but the magnitude of T and B cell responses against B.1.1.529 spike protein was reduced. Immune imprinting by infection with the earlier B.1.1.7 (Alpha) variant resulted in less durable binding antibody against B.1.1.529. Previously infection-naïve HCWs who became infected during the B.1.1.529 wave showed enhanced immunity against earlier variants but reduced nAb potency and T cell responses against B.1.1.529 itself. Previous Wuhan Hu-1 infection abrogated T cell recognition and any enhanced cross-reactive neutralizing immunity on infection with B.1.1.529.

Idioma originalEnglish
Número do artigoeabq1841
RevistaScience
Volume377
Número de emissão6603
DOIs
Estado da publicaçãoPublicado - 15 jul. 2022
Publicado externamenteSim

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