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Postvaccination SARS-CoV-2 Infections Among Skilled Nursing Facility Residents and Staff Members ? Chicago, Illinois, December 2020?March 2021

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  • Postvaccination SARS-CoV-2 Infections Among Skilled Nursing Facility Residents and Staff Members ? Chicago, Illinois, December 2020?March 2021

    Early Release / April 21, 2021 / 70

    Richard A. Teran, PhD1,2*; Kelly A. Walblay, MPH2*; Elizabeth L. Shane, MPH2; Shannon Xydis2; Stephanie Gretsch, MPH3; Alexandra Gagner, MPH2; Usha Samala, MPH2; Hyeree Choi2; Christy Zelinski, MPH2; Stephanie R. Black, MD2

    Early studies suggest that COVID-19 vaccines protect against severe illness (1); however, postvaccination SARS-CoV-2 infections (i.e., breakthrough infections) can occur because COVID-19 vaccines do not offer 100% protection (2,3). Data evaluating the occurrence of breakthrough infections and impact of vaccination in decreasing transmission in congregate settings are limited. Skilled nursing facility (SNF) residents and staff members have been disproportionately affected by SARS-CoV-2, the virus that causes COVID-19 (4,5), and were prioritized for COVID-19 vaccination (6,7). Starting December 28, 2020, all 78 Chicago-based SNFs began COVID-19 vaccination clinics over several weeks through the federal Pharmacy Partnership for Long-Term Care Program (PPP).? In February 2021, through routine screening, the Chicago Department of Public Health (CDPH) identified a SARS-CoV-2 infection in a SNF resident >14 days after receipt of the second dose of a two-dose COVID-19 vaccination series. SARS-CoV-2 cases, vaccination status, and possible vaccine breakthrough infections were identified by matching facility reports with state case and vaccination registries. Among 627 persons with SARS-CoV-2 infection across 75 SNFs since vaccination clinics began, 22 SARS-CoV-2 infections were identified among 12 residents and 10 staff members across 15 facilities ?14 days after receiving their second vaccine dose (i.e., breakthrough infections in fully vaccinated persons). Nearly two thirds (14 of 22; 64%) of persons with breakthrough infections were asymptomatic; two residents were hospitalized because of COVID-19, and one died. No facility-associated secondary transmission occurred. Although few SARS-CoV-2 infections in fully vaccinated persons were observed, these cases demonstrate the need for SNFs to follow recommended routine infection prevention and control practices and promote high vaccination coverage among SNF residents and staff members. ...

    https://www.cdc.gov/mmwr/volumes/70/...cid=mm7017e1_w
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