[@Aisling] "He needs ordinary blood, but there's one problem with vampires..." Dracula's father explained. "We 'use up' the blood that we drink, like humans digest food. That's why we have to drink so much of it every day. And if a human loses blood, it takes the body up to three months to compensate for it. A vampire's body takes twice as long, due to the fact that we diget blood, and that we can't produce our own blood cells like the human body does."