I trust that advice to wear a mask would not be a reason for PARF, just as sharing on the futility of doing so wouldn’t be, either. I say this b/c there are folks at more risk than others who are rightfully concerned about contracting C19
but think they’re safe with a mask and then take on more risk. That is an incorrect assumption based upon the best meta-analysis off the years-long data we have at our disposal now.
https://www.cochranelibrary.com/web/cochrane/content?templateType=full&urlTitle=/cdsr/doi/10.1002/14651858.CD006207.pub6&doi=10.1002/14651858.CD006207.pub6&type=cdsr&contentLanguage=