Thank you John! Yes "anything can grow in those things"... About anything can grow in anything, esp. in humid Ga. Most people won't put on a dirty mask. Cloth can be washed, others tossed or sprayed a time or two. If everyone worn them for a short period of time, maybe we would have this behind us by now....who knows. Nurses in hospitals are confirming that even people with C.O.P.D. and those giving birth, can wear a mask without their oxygen levels going down.