Here's an experiment you can easily do. Wait for a foggy day. Go outside with a cloth tied over your face for half an hour. Come back in. The cloth will be damp. The reason it is damp is because it's picking up moisture from the fog as you breathe through it, and in the process of that it is stopping some of the fog from getting into your lungs. Fog is an aerosol.
So, gosh, masks are not 'useless against aerosols' at all, are they? They are not completely effective against aerosols but they are not completely ineffective, either. Masks help: who knew?
But of course, I'm sure you 'know' better. I mean who am I but a mere scientist, while you of course understand everything.
Biting the hand that feeds IT
