I would bet that Jeremiah hit the nail on the head. They have probably become very tough to where it doesn't affect them like it would to use who are not used to it; however, I bet that has been really hard on their lungs. I don't care how annoying having a mask on would be, it isn't worth letting your lungs being destroyed like that. I think some of the lack of safety measures like this cut my Grandfather's life shorter than it should have been. Oh well, he's better off where he is now, at least he isn't miserable anymore because he misses his wife, now that they are together.