Effectiveness of COVID-19 mRNA Vaccination in Preventing COVID-19–Associated Hospitalization Among Adults with Previous SARS-CoV-2 Infection — United States,June 2021–February 2022
1.Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, CDC; 2.CDC COVID-19 Emergency Response Team; 3.Epic Research, Epic Systems Corporation, Verona, Wisconsin.