For the first time in many US airport passages, someone asked me "do you have a mask, sir?" It was a flight attendant who was boarding a tram to leave the airport, as was I. I waited until the end of the ride, then handed her a copy of the NIH-published Stanford Study chart, which indicates the numerous negative health effects of wearing a mask, and said "This is for you." I then cited NIH and Stanford, to stave off any snippy retort. She thanked me. and as I passed through baggage claim I noticed that she was still holding it. I printed 30 or so copies of the chat as hand-outs for rare situations (in my experience) like this. This occurred at SeaTac Airport.