Clinical Question: What is the evidence for asymptomatic transmission of COVID-19 (including those who will remain asymptomatic and those who are early and not symptomatic yet)?
Bottom Line: Transmission of COVID-19 can occur in people who are currently asymptomatic. Case reports suggest this occurs in 6-13% of cases, although modelling suggests this might be higher. The importance of asymptomatic transmission is heightened by reports that ~50% of carriers are asymptomatic when an entire population (example cruise ship) is tested. Physical distancing should assist in preventing transmission from asymptomatic individuals.
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