N95 masks very likely do provide a lot of protection from airborne virus droplets and aerosols, but they are still unavailable in most parts of the world includ

N95 masks very likely do provide a lot of protection from airborne virus droplets and aerosols, but they are still unavailable in most parts of the world including the US. I was able to find some Korean KF94 masks though. There is no evidence for one way protection btw. It may be true but right now it is entirely speculative.