In Kurt Vonnegut, Jr.'s Hocus Pocus, the narrator is given a copy of "Black Garterbelt," which contains a story by Kilgore Trout called "The Protocols of the Elders of Tralfamadore", which is something of a satire of the anti-semitic tract "the Protocols of the elders of Zion". In it, the E. of T. have a plan to colonize the universe with life spawned on earth -- only they mean to use the viruses and bacteria, not the people, so they sneak a bit into the bible as it's being written down that encourages people to act rapaciously and self-destructively. The narrator refers to diseases in the book as astronaut candidates.