A Bivalent Omicron-containing Booster Vaccine Against Covid-19

Background Updated vaccination strategies against acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern are needed. Interim results of the safety and immunogenicity of the bivalent omicron-containing mRNA-1273.214 booster candidate are presented. Methods In this ongoing, phase 2/3 trial, the 50-μg bivalent vaccine mRNA-1273.214 (25-μg each ancestral Wuhan-Hu-1 and omicron…

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