Lovely people, you will be glad to know that no one in the US has been bitten by a rabid squirrel. This is likely because if a squirrel was bitten by a rabid animal, the squirrel was probably also killed by that animal. They are not a vector for rabies. Most likely, no one will offer you rabies shots if you get bitten because it would be a waste and expensive and painful (maybe).
Also they do bite. It is best not to touch one or feed it from your hands, unless you are a masochist. Those are vicious bites.
If you spend a lot of time in the company of squirrels, they will eventually get bold enough to come very close to you. This is not the time to let your oh what a cute little baby pookie pooh instincts come to the fore. They will bite you. It will hurt. A lot. And you will have to go to the ER.
My ex husband had a pet squirrel. Rescued from falling from its nest, presumably, when it was a tiny hairless infant. His father named it Freud because it liked nuts. That squirrel spent his evenings in his father's shirt pocket or just hanging around with his father. He did not bite (but the father allegedly did - his bark was not worse than his bite.). Freud was a pet.
If anyone is interested, there is a great book about squirrels called
Squirrels of the World, by research scientists at Johns Hopkins:
Richard W. Thorington, Jr., John L. Koprowski, Michael A. Steele, and James F. Whatton