Something like this happened in Colorado in the last couple of years. BIL had been to the dentist in that case and had to be tested for all kinds of things. Come to find out, he had only been to that dentist for a consult, but still scary.
I cannot imagine how all of those employees were willing to work in that environment. It baffles my mind that not only was the doctor allowing it to happen, but every single one of his employees were putting the patients at risk. THAT'S SO GROSS.