Vampires are not real, the original "Vampires" were not vampires, in fact as I read it, Dracula was only mentally insane. That is how "vampires" got started into Hollywood movies.
Werewolves, were started by the ancient Egyptians werewolves as hieroglyphics of men transforming in this hideous creature or have some type of decease that causes a non-normal amount of hair upon the body.
But werewolves like werewolves off Hollywood movies are not real. Those who believe they are werewolves or vampires, will tend to mentally believe they are, so in their mind yes, but in physical form no..They end up committing what is called cannibalism.