List of fictional diseases

Prince Prospero flees the red death. The Masque of the Red Death, picture by Roger Corman, 1964.

Diseases, disorders, infections, and pathogens have appeared in fiction as part of a major plot or thematic importance. They may be fictional psychological disorders, magical, from mythological or fantasy settings, have evolved naturally, been genetically modified (most often created as biological weapons), or be any illness that came forth from the (ab)use of technology.