3 ms·
Proper fit of face masks is more important than material, study suggests
- hilbert42 6y agoThis was obvious even before COVID-19. I used N95 masks before the pandemic for stopping industrial particulates and the box clearly stated that bad fitting rendered them ineffective. Moreover, the N95 instructions said if you had a beard the mask was ineffective. (Damn obvious really!) Why at this late juncture are we reinventing the wheel? More madness, more wasted time.
- deleted 6y ago[deleted]