Early Estimates of Bivalent mRNA Vaccine Effectiveness in Preventing COVID-19–Associated Hospitalization Among Immunocompetent Adults Aged ≥65 Years — IVY Network, 18 States, September

This report describes the effectiveness of the updated (bivalent) COVID-19 vaccines for prevention of COVID-19-associated hospitalization among adults ages 65 years or older who did not have a weakened immune system and who were hospitalized with COVID-19-like illness.