so the mask is made of a magical substance that only lets the virus through one way? please.
If one coughs, or even respires heavily (running, shouting); the virus is spread far and wide. If one is wearing a mask, it doesn’t spread as far. Mask wearing is like covering your face with a tissue when you sneeze or cough. No magic required.
USA (little mask-wearing) Deaths/million = 204
Taiwan (mask-wearing) Deaths/million = 0.3
S.Korea (mask-wearing) Deaths/million = 5.0
Japan (mask-wearing) Deaths/million = 4.0
https://www.worldometers.info/coronavirus/