1) In the Oxford Dictionary, the word Vampire makes its first presence in 1734.
2) During the vampire panic in New England, vampires were finding a new role in European books like The Vampyre (1819), Carmilla (1871-72), and Dracula (1897).
3) Chinese vampires were called a ch'iang shih (corpse hopper) and had red eyes and crooked claws. They were said to have a strong intimate drive that led them to attack women.
4) Vampire legends may have based on Vlad of Wallachia, also known as Vlad the Impaler (c. 1431-1476). He had habit of nailing hats to people's heads, skinning them alive, and impaling them on upright stakes.
He also liked to dip bread into the blood of his enemies and eat it. His name, Vlad, means son of the dragon or dracula, who has been identified as the historical dracula. Though Vlad the Impaler was murdered in 1476, his tomb is reported empty.
5) A rare disease called porphyria (also called the 'vampire' or 'Dracula' disease) causes vampire like symptoms, such as an extreme sensitivity to sunlight and sometimes hairiness. In extreme causes, teeth might be stained reddish brown, and eventually the patient may go mad.
6) One of the most famous true vampires was Countess Elizabeth Bathory (1560-1614) who was accused of biting the flesh of girls while torturing them and bathing in their blood to retain her youthful beauty. She was by all accounts a very attractive women.
7) Thresholds have historically held significant symbolic value, and a vampire cannot cross a threshold unless invited. The connection between threshold and vampires seems to be a concept of complicity or allowance. Once a commitment is made to allow evil, evil can re-enter at anytime.
8) According to several legends, if someone was bitten by a suspected vampire, he or she should drink the ashes of a burned vampire.
9) Prehistoric stone monuments called "dolmens" have been found over the graves of the dead in northwest Europe. Anthropologists speculate they have been placed over graves to keep vampires from rising.