What's interesting is that in many cases, you will
not be given a vaccine. A skunk bite will do the trick, but if you were bitten by a squirrel, you probably won't be getting any. You can probably read your state's guidelines online. My state has a surprisingly narrow list of animals that entitle you to a shot.
The theory behind it is that some mammals are somewhat less likely to be carriers, but it's not a comforting thought, right? You have a somewhat lower chance of certain death than if you were bitten by a bat, so we will deny you a pretty safe vaccine.