> I've yet to find any explanation as to why if someone is wearing a (properly fitted) N95, so their air goes through a filter media, which has been repeatedly

> I've yet to find any explanation as to why if someone is wearing a (properly fitted) N95, so their air goes through a filter media, which has been repeatedly shown to block droplets, they could still inhale disease-carrying droplets. It's worth keeping in mind that even if someone wearing an N95 mask does manage to inhale some percentage of the airborne disease-carrying droplets around them, viral load matters a lot. A tiny amount of virus could be fought off by the immune system before it has a chance to take hold in the body, and even if that fails and the virus does infect the body, larger exposures tend to result in worse outcomes. Even an imperfect protection can have a beneficial effect. It's the same for people spreading the virus. Even if a mask isn't perfect, that doesn't make it useless. Putting just about anything in front of someone's virus spewing face holes is going to reduce the amount of virus that gets into the air and limit how far it spreads. This is why we teach small children to "vampire cough". Not because the inside of our elbows provide N95 levels of protection, but because doing so still helps to prevent the spread of disease.