Did vampires exist

Answer 1

No. Vampires are a creature of folklore. The modern version by Bram Stoker is based in part on the legends of Vlad Dracul (Vlad the impaler) a 15th century Hungarian tyrant and torturer who is said to have consumed the blood of his victims.

Other examples of human cannibalism and hemophagy (blood drinking) exist in history.

One real vampire is the South American vampire bat (Desmodus rotundus), a parasite on cattle and other mammals. They use their teeth to make a small slit in the skin, then lap up (not suck) the blood, while their saliva prevents its coagulation.
Many religions believe that vampires are real, while others refuse such a revolting image. The many stories and movies saying that vampires living among us - especially the Chronicles of Vladimir Tod, the Cirque Du Freak series, and the Twilight saga (all are amazing vampire books, highly recommended) - lead many to believe that the existence of vampires is truthful. Many others that do not believe in vampires still wish them to be real. I highly doubt that vampires are real, and we may never know the truth. But yet, I always say to my fellow vampire fans, "Keep dreaming."