A job that puts one in close proximity of some of the most filthy dental conditions/rot/decay and gum disease, and bacterial infection potential with skin contact or inhalation. No thanks w/ or w/out facemask, gloves eyeglasses.
The proximity is said to incline to depression. Dentists might tell you this.
I hear that changing diapers is kinda hazardous duty too. Wonder why children are still born every day...mebbe there are compensations?