Daniel Geller/The Reaver
Daniel Geller goes by the name "the Reaver" and is a villain from DC Comics' The Spectre, which was out in the early 1990s. After becoming HIV positive through sex with a woman, Geller goes on a killing spree killing -- you guessed it -- HIV-positive women. He calls them "diseased bitches."
He eventually kills the woman from whom he contracted HIV -- Amy Beitermann -- after cornering her in an alley. While Amy lies dying and covered in her own blood, her friend Nate Kane is scared to touch her because of her HIV-positive status. The only person willing to touch Amy is Madame Xanadu, a sorceress who has magical protection from HIV.