A vampire is a being steeped in folklore known to rise from the "dead" and, with some exceptions, feast on human blood. They are impervious to most forms of death, and can be killed by keeping a wooden stake through the heart. It is believed that lack of knowledge of porphyria led to legends of vampirism in Asia. (TXF: "3")
Most legends agree that vampires live eternal lives, while others limit it to forty days. Some vampires are killed by sunlight, while others are not. Vampire activity is generally rampant near cemeteries, castles, catacombs, and swamps. Signs that vampiric activity has occurred include broken or shifted tombstones, the absence of singing birds, faint groaning coming from underground, or manducation. One thing that is agreed about vampires in all cultures is that they are obsessive-compulsive. One guaranteed method of surviving a vampire's attack is to scatter a bag of mixed seeds, buttons or other such objects in their path. No matter the species, a vampire will have no option but to stop its attack to pick up and sort the objects, giving the potential victim time to escape.
In the United States, cases have grown where certain clubs and groups pretend to be vampires, in part to blame from pop culture references like the Bela Lugosi movies. (TXF: "Bad Blood") One of these clubs is Club Tepes in Los Angeles, California. (TXF: "3")
In 1994, a trio of vampires and a woman named Kristen Kilar killed over seven people in Memphis, Tennessee, Portland, Oregon, and Los Angeles, California. This case was investigated by FBI Special Agent Fox Mulder. They were all burned to death in a fire caused by Kilar. (TXF: "3")
In February 1998, a group of vampires lived in Chaney, Texas, and were investigated by FBI Special Agents Fox Mulder and Dana Scully, after Ronnie Strickland killed several cows, a New Jersey vacationer named Dwight Funt, and later a Florida vacationer named Paul Lombardo. The town sheriff, Lucius Hartwell, attempted to cover up the events, but after Ronnie was discovered and nearly destroyed, Hartwell and the vampires left Chaney. (TXF: "Bad Blood")
List of Vampires
During the genesis of The X-Files, vampires were one element which Peter Roth, who helped develop the series with Chris Carter, believed the new show could primarily feature. This was because the film Interview with the Vampire was meanwhile being created, and because the idea of highlighting vampires seemed to work well in sync with the fact Carter wanted the series to be akin to The Night Stalker, which had centrally featured vampires. However, the notion of focusing on vampires didn't appeal to Carter, whose vision of the series instead had more to do with UFOs and, more broadly, the paranormal. (The Truth Is Out There: The Official Guide to The X-Files, p. 10)