Vampires and Vampirism

The Greek Church at one time taught that the bodies of persons upon whom the ban of excommunication had been passed did not undergo decomposition after death until such sentence had been revoked by the pronouncement of absolution over the remains, and that, while the bodies remained in this uncorrupted condition, the spirits of the individuals wandered up and down the earth seeking sustenance from the blood of the living.
The non-corruption of a body, however, was also held to be one of the proofs of sanctity; but, in this case, the body preserved its natural colour and gave an agreeable odour, whereas the bodies of the excommunicated generally turned black, swelled out like a drum, and emitted an offensive smell. Very frequently, however, when the graves of suspected vampires were opened, the faces were found to be of ruddy complexion and the veins distended with blood, which, when opened with a lancet, yielded a supply of blood as plentiful, fresh, and free as that found in the veins of young and healthy living human beings.
For many centuries in the history of Greek Christianity there was scarcely a village that had not its own local vampire stories which were related by the inhabitants and vouched for by them as having either occurred within their own knowledge or been related to them by their parents or relatives as having come within their personal observation or been verified by them.