http://www.sciencemag.org/news/2020/03/not-wearing-masks-protect-against-coronavirus-big-mistake-top-chinese-scientist-says

In Wuhan, China, people with mild COVID-19 cases were taken to large facilities and not permitted to see their families. “Infected people must be isolated. That should happen everywhere,” George Gao says.

Science’s COVID-19 reporting is supported by the Pulitzer Center.