For the most part, those studies that showed they did weren’t done on actual people, and weren’t done as random trials.
I’m sure that in certain situations masks help...but not generally, by people that don’t know how to wear them, don’t know how to put them on, and who wear them too long. Even hospital workers don’t generally wear masks in the manner in which the mandates required.
The masks do not work.
Did you even read the study?
Wishful thinking does not make it so.
Masks create a false sense of security and they are filthy.