I believe mask wearing is an excellent idea my real issue is why more people don't wear masks more often as the Thais, Japanese, Chinese etc do. Hopefully Westerners will learn. I noticed recently in a recent trip to a major issan city there was 99.9% mask compliance which I was pleased to see. Its only in Thai cities polluted by Farranagance and fantasies of western superiority that poor hygiene seems to be returning.