If people were compelled to wear n95 or p100 masks supplied at their own expense and forced to change them daily, the mask mandate would have died long ago. It survives because people were allowed an easy work around.
Properly worn. My son had to wear one before he entered hospital as a staff person. He wound up having to go to a dermatologist for sores and resulting scars from wearing a properly and professionally fitted N95/N100 for hours on end and days on end due to infection protocol in the hospital setting. His entire face hurt ... from a professionally sized and fitted mask. Most of the staff at the hospital had something similar. His was worse because his skin is a little more sensitive but otherwise all of the hospital staff forced to use the infection protocol the entire time they were on hospital grounds developed some type of facial irritation from the masks.
And you had to change the mask every time you changed patients along with gloves, paper gowns, etc.
My son never got covid ... as a matter of fact none of my immediate household caught it. We are all O's however ... both positives and negatives. My parents didn't catch it because for the most part hubby and I brought everything to them, then moved them down near us (for other health and financial reasons, not covid) and though they had wider exposure they never caught it either.
My brother on the other hand and his wife and their household caught it at least three times ... my sister in law and her children have some kind of genetic autoimmune thing and my brother takes arthritis meds that lower his immune response to anything/everything.
Everyone on here probably knows that our business deals with the public and their household habits ... we're landlords. Despite refusing to wear a mask and dealing with households that were infectious we still never got it. One of our workers did but he also takes arthritis meds.
Masks do not predict whether you are going to get covid or not. As a matter of fact masks can become a vector of infection. Your own health and meds you take if any is a bigger predictor and/or preventative than masks are.