Originally Posted by
BMEP100
N95 Mask media filtration ~ 0.3 microns
Corona virus about 120nm
like a human walking through the opening of the NASA hangar door.
But it looks like you care and is an outward sign of “compliance”, a supremely important factor in any totalitarian state, such as Communist China.
It's not filtering individual viruses, which are statistically harmless anyway (kind of like one sperm isn't going to get you pregnant).
It's filtering aerosols, tiny blobs of spit, snot, etc suspended in the air (the viruses are in the aerosols). You can rest assured the N95 is adequate for that.
As excargodog pointed out above, it's entirely reasonable that a large initial exposure (higher inoculum) will be more challenging for your immune system. So it might be worth catching as much of it as you can, even if you can't get it all.