They are creatures that physically have no differences to humans.A lot of times thought they have to consume some kind of energy basically taken from the humans around.There are 2 kinds of vampires the BLOOD VAMPIRES who drink blood to take energy and the PHYSIC VAMPIRES who 'drink' the real energy from humans.

----------------signs of vampirism--------------------------------
Many elaborate rituals were used to identify a vampire. One method of finding a vampire's grave involved leading a virgin boy through a graveyard or church grounds on a virgin stallion — the horse would supposedly balk at the grave in question.Generally a black horse was required, though in Albania it should be white.Holes appearing in the earth over a grave were taken as a sign of vampirism..