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Immunogenicity and safety of LP.8.1 variant-containing mRNA COVID-19 vaccines

2026-02-26 infectious diseases Title + abstract only
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BackgroundThe SARS-CoV-2 LP.8.1 subvariant was incorporated into the 2025-2026 U.S. COVID-19 vaccines (mRNA-1273.251 and mRNA-1283.251). We evaluated immunogenicity and safety of these vaccines against vaccine-matched and emerging variants in individuals aged [≥]65 and those aged 12-64 years at high-risk of severe COVID-19. MethodsData were generated from: (1) two independent, ongoing, phase 3b/4, open-label, single-arm studies in which participants received a single dose of 50-{micro}g mRNA...

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