Effectiveness of a COVID-19 Additional Primary or Booster Vaccine Dose in Preventing SARS-CoV-2 Infection Among Nursing Home Residents During Widespread Circulation of the Omicron Variant — United States, February 14–March 27, 2022 | MMWR – cdc.gov
Namrata Prasad, PhD1,2; Gordana Derado, PhD1; Srinivas Acharya Nanduri, MD1; Hannah E. Reses, MPH1; Heather Dubendris, MSPH1; Emily Wong, MPH1;...