[_spoonman]

I think what OP means is N95 masks must be properly fitted to the individual. When my wife started working at a hospital she had to undergo such a fitting. So unless you get the proper size, you could still be exposed. I think that’s what he meant.

[Seenso]

> N95 masks must be properly fitted to the individual.... So unless you get the proper size, you could still be exposed.

I'd really like to know how often those fit tests actually result in someone needing to select a different respirator size or style.

I wonder if they're only needed if you're required to be 100% sure all your people can use their respirators with near-100% effectiveness. That's probably necessary if you're working in a contagious disease isolation unit or removing asbestos all day every day, but maybe not for less dangerous environments.