A lot of "Vampire" folklore get's lumped in together with the most popular depiction even if they only bear vague similarities. Also Dragons are common stand-ins for Satan, so there's a cursed by God angle baked in. On Coppola's film, I forget where I got this from, but it was apparently the originator for a romance between Mina and Dracula, which influenced the direction Vampire fiction went after, at least on film.
