dont wear em and even if i did wear one it would never stop me from getting infections as they happen by themselves. perhaps i would wear one on a plane, but thats it. unless you are wearing one of those specialmasks that filter germs out [cant remember the name, has a number in it], regular masks are useless for someone wanting protection from others due to poor filtering and gaps in the mask. they only work if they are on the person who is spreading the germs.