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Durable Humoral and Cellular Immune Responses Following Ad26.COV2.S Vaccination for COVID-19.


ABSTRACT: Interim immunogenicity and efficacy data for the Ad26.COV2.S vaccine for COVID-19 have recently been reported 1-3 . We describe here the 8-month durability of humoral and cellular immune responses in 20 individuals who received one or two doses of 5Ã-10 10 vp or 10 11 vp Ad26.COV2.S and in 5 participants who received placebo 2 . We evaluated antibody and T cell responses on day 239, which was 8 months after the single-shot vaccine regimen (N=10) or 6 months after the two-shot vaccine regimen (N=10), although the present study was not powered to compare these regimens 3 . We also report neutralizing antibody responses against the parental SARS-CoV-2 WA1/2020 strain as well as against the SARS-CoV-2 variants D614G, B.1.1.7 (alpha), B.1.617.1 (kappa), B.1.617.2 (delta), P.1 (gamma), B.1.429 (epsilon), and B.1.351 (beta).

SUBMITTER: Barouch DH 

PROVIDER: S-EPMC8282116 | biostudies-literature |

REPOSITORIES: biostudies-literature

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