If mask wearing is required and at least 80% of people wear masks, transmission of the virus is halted....
How can you prove that?
The major flaw in the article you posted is that the author states that the asymptomatic spread the virus. The cdc now says that’s not the case. Thus for these people wearing a mask is irrelevant.
I will concede that a mask on a symptomatic person will impede droplets but these people should just stay home.
or use a kleenex