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Dora AV, Winnett A, Fulcher JA, Sohn L, Calub F, Lee-Chang I, Ghadishah E, Schwartzman WA, Beenhouwer DO, Vallone J, Graber CJ, Goetz MB, Bhattacharya D. Using Serologic Testing to Assess the Effectiveness of Outbreak Control Efforts, Serial Polymerase Chain Reaction Testing, and Cohorting of Positive Severe Acute Respiratory Syndrome Coronavirus 2 Patients in a Skilled Nursing Facility. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America. 2021 Aug 2; 73(3):545-548.
We characterized serology following a nursing home outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) where residents were serially tested by reverse-transcription polymerase chain reaction (RT-PCR) and positive residents were cohorted. When tested 46-76 days later, 24 of 26 RT-PCR-positive residents were seropositive; none of the 124 RT-PCR-negative residents had confirmed seropositivity, supporting serial SARS-CoV-2 RT-PCR testing and cohorting in nursing homes.