Though this graffiti from Texas would have you believe that there are cats out there brandishing hypodermic needles or purposely having unprotected sex to spread feline AIDS, that’s not quite the case. According to the feline AIDS wikipedia page, 2.5% of cats in the U.S. have it, it’s spread by saliva (so is often spread when feral cats get into fights), and attacks the immune systems of cats. But many cats can live happily and healthily with it, though they should be kept apart from uninfected cats.
Cats with AIDS look like any other cats. Some evidence*:
So, today, on World AIDS Day, please think of the cats.
*I found these photos on Flickr tagged with cat and AIDS.