From what I read, I doubt it, but it always remains a remote possibility. Bears get rabies.

There have been rabid bear attacks here in Maryland, in Virginia, and (I think) in Pennsylvania. These attacks are very rare. As I understand it, once infected, the rabies kills the bear relatively quickly.

In both the Maryland and Virginia attacks, the only means to stop the bear was to use lethal force, i.e. shotguns. I don't know what happened in the Pennsylvania attack.