I thought about that but don’t know about how much could become airborne if using a hair dryer.
On low/no fan setting and heat source higher than 150, wouldn't even airborn virus get "cooked" before traveling even an inch or too? Or place mask in large coffee can, cut hole in lid for dryer nozzle, more uniform hot air circulation. Sounds like an easy to set up field expedient test for efficacy...much like the recent Japanese Dr. test surgical masks vs paper towel and cotton masks..