The problem is that wearing a mask only provides a limited amount of protection for the wearer. The best results are when people who are shedding the virus (unaware, I assume) wear a mask. That limits the radius that airborne droplets containing virus particles can spread.
The problem is that wearing a mask only provides a limited amount of protection for the wearer. The best results are when people who are shedding the virus (unaware, I assume) wear a mask. That limits the radius that airborne droplets containing virus particles can spread.
See this Youtube video for an example.
Edit to fix link.