Vampires can be killed by wodden stackes.

Real Vampires are human, just a different type of human (another race in a way).  The myth derives from the belief that vampires were undead and the blood in their body would continue to flow unless they stopped the flow at the source.  Sometimes the person believed to be a vampire would be staked both in the head and the heart.  Real vampires can be killed by being impaled by anything in the heart, or being shot or poisoned, or anything that would kill a normal human.