Early Estimates of Bivalent mRNA Booster Dose Vaccine Effectiveness
in Preventing Symptomatic SARS-CoV-2 Infection Attributable to Omicron
BA.5– and XBB/XBB.1.5–Related Sublineages Among Immunocompetent
Adults — Increasing Community Access to Testing Program,United States,
December 2022–January 2023
1.National Center for Immunization and Respiratory Diseases, CDC; 2.Eagle Health Analytics, San Antonio, Texas; 3.Center for Preparedness and Response, CDC. 4.Epidemic Intelligence Service, CDC.