There have been a few of those samples. https://www.cebm.net/covid-19/covid-19-what-proportion-are-asymptomatic/ https://www.cebm.net/covid-19/covid-19-what-pr

There have been a few of those samples. https://www.cebm.net/covid-19/covid-19-what-proportion-are-asymptomatic/ https://www.cebm.net/covid-19/covid-19-what-proportion-are-a...