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3. Presymptomatic SARS-CoV-2 infections and transmission in a skilled nursing facility;Arons;The New England Journal of Medicine,2020
4. Asymptomatic SARS-CoV-2 infections: A living systematic review and meta-analysis;Buitrago;MedRxiv,2020
5. Transmission of SARS-CoV-2 by people without symptoms of COVID-19;Butler;JAMA Network Open,2020