I can tell you that dressing and undressing is HazMat suits is extremely difficult to do without proper training. I have had extensive experience with this when I was doing valve and pump repairs in nuke plants. Taking all that stuff off and trying not to have it touch your skin is really difficult. Some things they should be using.
A. A buddy system. Someone watches you undress.
B. Visual examination by another person after you're undressed. No need for radioactive detection like we used in nuke plants, but some kind of ultra-violet light to show spotting on the skin.
C. Even the suspicion of contamination and you get scrubbed. That means you off to the scrub area, naked as a jaybird, and you get scrubbed head to toe and toe to head and back again by people trained to do so.
D. You go back for another examination. You don't leave until someone in authority gives written authorization.
Honestly, I can't believe they're not already doing this. It's not exactly an unknown procedure. Been in use for decades.