I am sure she will be fine.
It seems that risk of rabies in USA outweighs the risk of vaccinosis.
While in the rest of the world cats almost never transmit rabies to humans, according to some statistics, for some reason in the USA, cats are the most common source of infection for humans.
In any case both you and Shelly if you are approached by auspiciously friendly racoons, skunks, possums, squirrels or foxes with no fear of humans whatsoever, run for your life.
The same applies if you see bats flying out in broad daylight.
*Added for clarity: -cats are not most common source of infection for humans but are most commonly affected domestic animal in USA
No cat-to-cat transmission of rabies has been recorded, and no feline rabies virus variant is known. However, cats are the most commonly reported rabid domestic animal in the USA. Virus is present in the saliva of rabid cats, and people have developed rabies after being bitten by a rabid cat. Reported cases in domestic cats have outnumbered those in dogs in the USA every year since 1988.