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Following identification of a case of coronavirus disease 2019 (COVID-19) in a health care worker, 76 of 82 residents of a long-term care skilled nursing facility were tested for SARS-CoV-2; 23 (30.3%) had positive test results, approximately half of whom were asymptomatic or presymptomatic on the day of testing.
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Kimball et al. (2020) studied this question.
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