3 ms·

The 95 in N95 literally means 95%

• BurningFrog 7y ago
  But 95% of what? Probably not calibrated on Coronavirus transmission.
  • chillacy 7y ago
    Non-oil particles over 0.3 nm, of which droplets containing viruses is one of. There are P100 masks (oil+non-oil) as well, but they're more expensive and harder to breathe through.