Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Risk for SARS-CoV-2–Related Hospitalization and Estimation of Vaccine Effectiveness Among Persons Who Received a Booster Dose of mRNA COVID-19 Vaccine in the VA Health Care System and Their Matched Counterparts Who Did Not Receive a Booster Dose From 1 December 2021 to 31 March 2022
