The WHO has stated that to date, as of April, 2020, “there has been no
documented asymptomatic transmission“. In other words, healthy people do not spread it.
And thus, requiring healthy people to wear masks to protect others is based on nothing but false assumptions and false accusations.
on p. 2 of their report from above:
Asymptomatic transmission
An asymptomatic laboratory-confirmed case is a person infected with COVID-19 who does not develop symptoms.
Asymptomatic transmission refers to transmission of the virus from a person, who does not develop symptoms.
There are few reports of laboratory-confirmed cases who are truly asymptomatic, and to date, there has been no
documented asymptomatic transmission. This does not exclude the possibility that it may occur. Asymptomatic cases
have been reported as part of contact tracing efforts in some countries.
WHO regularly monitors all emerging evidence about this critical topic and will provide an update as more information
becomes available.