Whateporn's cats and dogs on the move?
"The risk for contracting rabies runs highest if your cat is exposed to wild animals. Outbreaks can occur in populations of wild animals (most often raccoons, bats, skunks and foxes in this country) or in areas where there are significant numbers of unvaccinated, free-roaming dogs and cats. In the United States, rabies is reported in cats more than in any domestic species."
Rabies in Cats
" In 2010 approximately 1.1% of cats and 0.3% of dogs tested for rabies were found positive."
CDC - Rabies Surveillance in the U.S.: Domestic Animals - Rabies
It seems that in US it is 10 times more likely for your cat to get rabies (1/100) than vaccination induced tumor in the worst case (1/1000).