the study...now with Omicron, N95/KN95 masks have become available to all...and we all know they work exceptionally well...just follow the updated CDC guidance...not sure why this is so challenging...what prize do you win for not using a simple and effective item to help you and others stay safe?
Whether of not people follow the CDC's guidance and updates as new variants show up is another matter...but as Baron's MIT Study showed...all masks have some degree of mitigation benefit...some more than others.