Characteristics
A vampire is a human being who has died but has been resurrected by specific supernatural means and possesses a variety of supernatural and superhuman abilities with specific limitations and needs, most notably the need to frequently ingest fresh blood (usually human) in order to maintain their own existence and to strengthen their powers. Vampires have often been referred to as "undead" throughout the centuries since, even when active, they were not truly alive in the same sense as ordinary human beings. Technically, they can be classified as actually being dead; lifeless corpses that are animated and sustained by supernatural forces.
Read more about this topic: Vampire (Marvel Comics)