Annals of Internal Medicine | 2021
SARS-CoV-2 Vaccine Effectiveness in a High-Risk National Population in a Real-World Setting
Abstract
Data are urgently needed on the real-world effectiveness of the currently administered COVID-19 vaccines. This case–control study evaluated the short-term effectiveness of currently administered vaccines in preventing confirmed SARS-CoV-2 infection among veterans receiving care in the U.S. Department of Veterans Affairs health care system.