Ginny Weasley is a Vampire!

Look what I found in the Wikipedia entry for Romanian vampires:

Romanian tradition described a myriad of ways of bringing about a vampire. A person born with a caul, an extra nipple, a tail, or extra hair was doomed to become a vampire. The same fate applied to someone born too early, someone whose mother encountered black cat cross her path, and someone who was born out of wedlock. Others who became vampires were those who died an unnatural death or before baptism, the seventh child in any family (presuming all of his or her previous siblings were of the same sex), the child of a pregnant woman who avoided eating salt, and a person who was looked upon by a vampire or a witch. Moreover, being bitten by a vampire meant certain condemnation to a vampiric existence after death.