3 ms·
According to OSHA "Fit factor is a quantitative estimate of the fit of a particular respirator to a specific individual, and typically estimates the ratio of t
by subroutine 7y ago
According to OSHA
"Fit factor is a quantitative estimate of the fit of a
particular respirator to a specific individual, and typically estimates the ratio of the concentration of a
substance in ambient air to its concentration inside
the respirator when worn."
So I guess 100% would be like if the test aerosol had an ambient concentration of 100 µg/cubic meter, inside the mask the concentration would be < 1 µg/m3.
67% would be 33 µg/m3.
Doesn't seem like a fool proof mask but there is prelim evidence that the initial virus load has an effect on symptom severity. If you could cut exposure to 1/3 i suppose that is better than nothing.