Having spent eight years working in a hospital and three years on the infectious disease committee at Fauquier hospital I know a little bit of such protocols! Last year at the school board meeting I walked up and was the first one to make public comments, wearing my gas mask from the military. I did this to prove a point and brought up N 95 and N 100 mask and stated their specs. Having mild COPD I can tell you firsthand how harmful this mask , to quote our president, malarkey is hurtful.