Published by Oxford University Press on behalf of Infectious Diseases Society of America 2022. This work is written by (a) US Government employee(s) and is in the public domain in the US. 1 Effectiveness of COVID-19 mRNA vaccines against infection during an outbreak of SARS-CoV-2 Beta 1 (B.1.351) variant in a skilled nursing facility – Virginia, March-April 2021 2 3 Heidi L. Moline, MD: COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, 4 GA; Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, GA. 5 Amelia Keaton, MD: COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, GA. 6 Whitney Rice: Virginia Beach Health Department, Virginia Beach, VA. 7 Jasmine Varghese, MS: COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, 8 GA. 9 Li Deng, PhD: COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, GA. 10 Ansley Waters, MPH: Council of State and Territorial Epidemiologists; Virginia Department of Health, 11 Richmond, VA. 12 Anna Barringer: : Virginia Beach Health Department, Virginia Beach, VA. 13 Devonne Winston: Virginia Beach Health Department, Virginia Beach, VA. 14 Virgie Fields, MS: Virginia Department of Health, Richmond, VA. 15 Kara Jacobs Slifka, MD: COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, 16 GA. 17 Jennifer R. Verani, MD: COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, 18 GA. 19 Stephanie J. Schrag, DPhil: COVID-19 Response Team, Centers for Disease Control and Prevention, 20 Atlanta, GA. 21 John Jernigan, MD: COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, GA. 22 Jacqueline E. Tate, PhD: COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, 23 GA. 24 ACCEPTED MANUSCRIPT Downloaded from https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciac526/6618595 by guest on 11 July 2022