Vampires are fiction. The imaginative product of mass hysteria, created in a time of ignorance.
Humans are the ultimate, singular species. They stand uncontested at the top of the food chain.
Neither of these statements are true.
Vampires exist. Humans are their prey. They are the branch of the evolutionary tree that did not fail and they live among humans undetected. Safe within their own culture, each subspecies thrives, all slightly different, yet kin to one another.