I'd be very cautious about getting a rabies vaccine during a surgery. The surgery and anesthetic are already dangerous in and of themselves. Rabies is a "big" vaccine (in terms of reaction) - if a reaction occurs, what then, when the body is already without food/water x12-16 hours, is trying to recover from anesthesia, and was just traumatized by surgery?
How would you even know a reaction is occuring if 1) they're unconscious or 2) they're in recovery from anesthesia?
I don't understand giving rabies during sugery at all. Am I missing something?