Effectiveness of Pfizer-BioNTech and Moderna Vaccines in Preventing SARS-CoV-2 Infection Among Nursing Home Residents Before and During Widespread Circulation of the SARS-CoV-2 B.1.617.2 (Delta) Varia
by from on (#5NG05)
COVID-19 mRNA vaccines, Pfizer-BioNTech and Moderna, are effective against infection among nursing home residents, but effectiveness declined in recent months.