Preliminary evidence from the earliest outbreaks indicated the virus could spread even if people didn’t have symptoms… But the WHO says that while asymptomatic spread can occur, it is ‘very rare’.”

Will Feuer and Noah Higgins-Dunn. Asymptomatic spread of coronavirus is ‘very rare,’ WHO says. CNBC News. 10 June 2020. https://www.cnbc.com/2020/06/08/asymptomatic-coronavirus-patients-arent-spreading-new-infections-who-says.html