They keep reassuring us that this disease is hard to catch, but doctors using all the necessary safety gear that would prevent them from getting the most virulent viral infection known to man are somehow mysteriously coming down with this virus.
Someone is lying to us. The question is.... Why?
I'm sure working all day with infected people takes away some of the mystery. They are not causal, short-duration interactions.
Either someone is lying, or it’s a previously unknown strain for which the precautions are ineffective. There’s no way of knowing for sure so quarantine is the only realistic option until they can figure out how to deal with it.