This woman on the #subway was doing her best to be helpful. I'd taken off my K(N)-95-style #respirator & #FaceShield, to mop down the sweat. After reconstructing, she tapped my elbow and said I shouldn't have put that mask back on, it fell to the floor (5 second rule). She offered me another #mask (more later). I said I'm not worried about stuff I get from the floor, I'm worried about #airborne stuff like #BirdFlu and #measles. She shook her head, wearing a useless "surgical style" mask. #NYC