Image Source: Dracula Pictures.
My earlier post on doctors didn't address the medical treatment of diseases now considered to be the real source cases for famous Hallowe'en monsters: vampires, werewolves and zombies. There must be something to this medical angle; stories about these creatures usually involve diagnosis or treatment of fictitious illnesses, or a single response (such as a werewolf's silver bullet), which can stop the monster.
There are pictures of sufferers of real likely source diseases below the jump; one glance shows how they probably easily inspired stories about normal people transformed into supernatural monsters. Warning: the pictures below are graphic; please don't click to see more if you don't want to see disturbing images.