what is quantrell's vampire

"Quantrell's Vampire" does not seem to refer to a widely recognized term or concept in literature, film, or popular culture as of my last knowledge update in October 2023. It's possible that it could be a lesser-known work, a specific character, or a niche reference. If you could provide more context or details about what you're referring to, I would be happy to help clarify or find information related to it!