Where did you hear this?
My daughter works downtown at OU Med. She said the med workers there were getting threats and real nervous going to and from their parking areas to the hospital. Exactly what you said, they are thought to be spreading it. I don't know what their instructions are but in other states they are changing into their scrubs when arriving and before leaving. My daughter wears her flight suit to and from normally, IDK if she still is though.
I sent her some Sabre Red in a couple of different carry configurations.
A post went around on FB supposedly from the OU security telling them to be on alert and that the nursing staff would be changing at the hospitals.