The N for nonoil is for hydrocarbon vapors in an chemical or industrial setting think pil based paint vapor. Using the wrong mask with those kinds of vapors can kill ypu. Hence the P100 rating which is certified for hydrocarbon vapors as oil Proofed there is an R95 rating that’s oil resistant but not proofed like a P rating. The lipid coating of a sars covid ii virus is irrelevant to the masks NPR rating. Individual virus particles are never produced in thr human respiratory track they always are attached to mucus, water vapor droplets or solid particles leaving the lungs, throat or nostrils every one of those particles is multiple microns in size the whole the virus is smaller than the holes in the filter arguments is pure scientific ignorance. P100 rated filter will absolutely protect thr wearer against a lipid coating virus airborne on human generated aerosol droplets
The ignorance was mine. I thank you for the information.