I'm not sure exactly what you are asking for a source on. That people have claimed masks don't help? The idea appears to be widespread so I assume it must have

I'm not sure exactly what you are asking for a source on. That people have claimed masks don't help? The idea appears to be widespread so I assume it must have been said multiple times. Here is a famous one https://twitter.com/Surgeon_General/status/1233725785283932160 https://twitter.com/Surgeon_General/status/12337257852839321...