The world of horror cinema may be more saturated than ever with slashers like Freddy Krueger or stories of possession like The Exorcist. But before these types of terrors were brought to life, the foundations of horror came in monsters that plagued the world of folklore and literature long before the moving picture. One of the best examples of this was vampires, who started in the book Carmilla by Sheridan Le Fanu and later made famous in Bram Stoker's Dracula. These creatures of the night represented the power and terror that came from the unseen enemy as they looked human but were often monsters when it was time to feed.
Source：https://www.cbr.com/blade-revolutionary-secret-vampires/
