at this point, it hasn't been shown nor is there convincing evidence that the virus transmits itself through the air. as a guess, but most viruses don't stay viable in enough concentration when airborne. that doesn't you can walk into an infectious diseases hospital wing with sick people without a mask, but in normal daily life, you are probably better of without it. or else stay at home.
the main mode of transmission is expected to be surface contact with virus particles from surfaces. Meaning, sick person touch his face or his whatever, then touch the table, then you touch the table then touch your face. that's how you get it. I think sam is a bit impatient to explain at length because he 1001 things to do or whatever, but unless the person sneezes or coughs straight in your face, a mask is probably worse because a child has no discipline in making sure hands are clean before they adjust the mask and will probably do so 1000 times a day.
not only that but in sinkieland, all these masks N95 and whatever saturate very quickly because of ambient humidity. The mask then becomes a welcome home for virus particles and other bacteria.
