When this first hit I quickly read every mask study I could find, typically concerning flu transmission.
My rule of thumb immediately became that it's pretty much useless outside of N95 masks...which luckily I already had a case of for use in my shop. Most people appear to wear the functional equivalent of a sock, oft times with their nose showing.
When this first hit I quickly read every mask study I could find, typically concerning flu transmission.
My rule of thumb immediately became that it's pretty much useless outside of N95 masks...which luckily I already had a case of for use in my shop. Most people appear to wear the functional equivalent of a sock, oft times with their nose showing.