they are humans but they have a couple of diffrences; the real ones anyway. i don't know about the hollywood ones.
If you mean the transformation from human to vampire, the description given by Stephanie Meyer in Twilight is following: If a vampire bites you but resists the wanting of killing you, and the venom spreads and your heart keeps beating, at one point your body is totally frozen and your heart stops beating. Now you're a vampire. Hope this answers your question. Monkey-Girl 15:12, February 5, 2010 (UTC)