A lot of people from the US/Canada who claim they're vampire experts really aren't.

There's two big vampire stories here (a TV show called 'Buffy the Vampire Slayer' and a series of books by an author called Anne Rice) and a lot of these so-called vampire "experts" only know things from the show and the books. Some people end up taking their obsessions with the show and books too far and start thinking that vampires are real and/or they are experts on the subject. Few people take the time to learn about the various vampire myths throughout history.