can't find the source I learned it from first, but here is a different one https://www.forbes.com/sites/mattperez/2020/06/08/who-says-asymptomatic-spread-of-coronavirus-very-rare-but-experts-raise-questions/
WHO Says Asymptomatic Spread Of Coronavirus 'Very Rare,' But Expert...
"When we actually go back and say, 'How many of them were truly asymptomatic?' we find out that many have really mild disease, very mild disease," Dr. Maria Van Kerkhove said.
www.forbes.com