In simplest possible terms, that line of text means that:
1) The N95 does very well at keeping you from spitting/sneezing on someone as well as protecting you from his spitting/sneezing. (The big particles only and don't forget the safety glasses.)
2) If you forget to change masks as you should, you may very well kill yourself not with COVID or any other virus but with bacterial pneumonia. (Which, BTW was the real slayer during the Spanish Flu epidemic)
[BLEEP] a whole bunch of silly masks. Got a whole shelf load of Ivermectin, plus the entire family's either had the bug/recovered/has natural immunity or got such good genes we're antiseptic at twenty meters.
Really fun having a full house Physical at age 79, have the doctor read through the notes and look at me like I'm some kind of freak of nature.
Guess the Good Lord has more for me to do.