Wei WE, Li Z, Chiew CJ, Yong SE, Toh MP, Lee VJ. Presymptomatic Transmission of SARS-CoV-2 — Singapore, January 23–March 16, 2020. MMWR Morb Mortal Wkly Rep 2020;69:411–415. DOI: http://dx.doi.org/10.15585/mmwr.mm6914e1

Smith College

- Asymptomatic and Presymptomatic SARS-CoV-2 Infections in Residents of a Long-Term Care Skilled Nursing Facility - King County, Washington, March 2020
- Presymptomatic Transmission of SARS-CoV-2 — Singapore, January 23–March 16, 2020

Asymptomatic COVID-19 Infection References in the Morbidity and Mortality Weekly Report (MMWR)

Kimball, A. (2020). Asymptomatic and presymptomatic SARS-CoV-2 infections in residents of a long-term care skilled nursing facility—King County, Washington, March 2020. MMWR. Morbidity and mortality weekly report, 69.
https://www.cdc.gov/mmwr/volumes/69/wr/mm6913e1.htm?mod=article_inline

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