biostudies-literatureUnknown28(11)Lewis JWA SARS-CoV-2 P.1 (Gamma) variant outbreak occurred at a skilled nursing facility in Washington, USA, in April 2021. Effectiveness of 2 doses of mRNA vaccines against P.1 infection among residents in this outbreak was 75.0% (95% CI 44.5%-88.7%), similar to effectiveness for other pre-Delta variants among long-term care residents.Emerging infectious diseases2338-2341https://www.ebi.ac.uk/biostudies/studies/S-EPMC9622236biostudies-literatureVaccine Effectiveness against SARS-CoV-2 Variant P.1 in Nursing-Facility Residents, Washington, USA, April 2021.PMC9622236Fleming-Dutra KEHarrison CGacetta MLoughran JVarghese JDeng LClark SLewis JWJernigan JAfalseVaccine Effectiveness against SARS-CoV-2 Variant P.1 in Nursing-Facility Residents, Washington, USA, April 2021.A SARS-CoV-2 P.1 (Gamma) variant outbreak occurred at a skilled nursing facility in Washington, USA, in April 2021. Effectiveness of 2 doses of mRNA vaccines against P.1 infection among residents in this outbreak was 75.0% (95% CI 44.5%-88.7%), similar to effectiveness for other pre-Delta variants among long-term care residents.2022-01-01T00:00:00Z2022 Nov2025-04-04T07:45:13.53Z2025-04-04T07:45:13.53ZS-EPMC96222363617076410.3201/eid2811.221043