The causes of vampiric generation were many and varied in original folklore. In Slavic and Chinese traditions, any corpse that was jumped over by an animal, particularly a dog or a cat, was feared to become one of the undead.  A body with a wound that had not been treated with boiling water was also at risk. In Russian folklore, vampires were said to have once been witches or people who had rebelled against the Russian Orthodox Church while they were alive. 
Vampires (also known as The Cold Ones in Quileute legends) are the primary supernatural creatures of the Twilight universe . They are immortal beings who feed and survive on the blood of humans or animals.