I’m not sure if you’re serious. Or maybe you didn’t get me. I’m saying that I expect the pros in the field to have long before now figured out for sure whether masks are effective against airborne viruses. This or any other one.
I’m not sure if you’re serious. Or maybe you didn’t get me. I’m saying that I expect the pros in the field to have long before now figured out for sure whether masks are effective against airborne viruses. This or any other one.