Certainly you raise a really important point. That is, as health care workers move between facilities, they take with them any organisms that are on them, any bacteria or viruses that they happen to be in contact with, and they can transfer them to other spots. This is one of the big challenges with antibiotic resistance, in that these bacteria can move around on people and on other surfaces.
It is an issue that I think we have to be very aware of. I'm very happy that, at least in Ontario, we're trying very hard not to have people move around among these facilities, because I think it does present an unnecessary risk.