Why Annual Respirator Fit Testing is Necessary

We have seen numerous examples of respirators that do not fit the subject when they are fit-tested the following year. Primarily these are the N95-type filtering facepieces, but we have also observed the phenomenon with elastomeric respirators.
Latest Advances in Respirator Fit Testing: Is Your Current Method Outdated?

The next time one of your co-workers complains about the respirator fit test he or she is scheduled to undergo, show them the YouTube video below, which shows how fit testing was performed in the late 1930’s.