[semimojo]

They don't wear the masks in every public setting they visit.

They wear them for many hours every work day.

Also they don't wear the same masks day afer day after day.

Which would have no affect on the concentration of CO2, which is the basis for this paper's claims.

Face it, if this paper were accurate we would have a mental health crisis affecting most of our healthcare workers.

[kiryandil]

Doubling down behind your facemask, I see.       

Your clever little troll didn't work out that well, did it? I see posters schooling you right and left on this thread.

[CheshireTheCat]

It seems this study is saying that the younger a person is, the more harm a face mask does.

Children’s respiratory and other systems are not as well developed as adults.