Immunogenicity of Ad26.COV2.S vaccine against SARS-CoV-2 variants in humans.

ABSTRACT: The Ad26.COV2.S vaccine^1-3 has demonstrated clinical efficacy against symptomatic COVID-19, including against the B.1.351 variant that is partially resistant to neutralizing antibodies¹. However, the immunogenicity of this vaccine in humans against SARS-CoV-2 variants of concern remains unclear. Here we report humoral and cellular immune responses from 20 Ad26.COV2.S vaccinated individuals from the COV1001 phase I-IIa clinical trial² against the original SARS-CoV-2 strain WA1/2020 as well as against the B.1.1.7, CAL.20C, P.1 and B.1.351 variants of concern. Ad26.COV2.S induced median pseudovirus neutralizing antibody titres that were 5.0-fold and 3.3-fold lower against the B.1.351 and P.1 variants, respectively, as compared with WA1/2020 on day 71 after vac

SUBMITTER: Alter G 

PROVIDER: S-EPMC8357629 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature