More research supports use of bivalent boosters

19 December 2022

Bivalent boosters have been found to be effective in preventing medically attended COVID-19 compared with no previous vaccination among immunocompetent adults and provided additional protection when compared with previous monovalent mRNA vaccine doses only.

These were the findings of an analysis published Friday by the US Centers for Disease Control and Prevention (CDC) considering data from 798 immunocompetent adults ages 65 and older, nearly three-quarters of whom had underlying conditions.

Compared to unvaccinated individuals, the CDC said mRNA-based bivalent boosters were 84% effective at keeping these older people out of the hospital due to COVID-19.

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