I have a mask that would probably stop it. I own an auto body shop and use a respirator when I paint. It has a heavy paper filter then a 1 inch thick activated charcoal filter with a one way neoprene exhaust. I have n95 masks in my shop to use when sanding body filler or using lacquer primers. I don't trust the 95s when spraying catalyzed urethane paint.
You are right about the mask hysteria!
In that profession I would surely concur a very effective mask is warranted. You must have stories to tell about those who did not wear them.