As in the graphic novel series as well as in the first 30 Days of Night film, vampirism is portrayed as a virus. It can be spread through scratches, bites, and contact with vampire blood. The disease turns infected humans into the undead; giving them black eyes, a mouthful of shark-like fangs, and aversion to sunlight as well as superhuman strength, speed, and acute senses of sight, smell, and hearing. Once a human becomes a vampire, they are no longer receptive to human emotions or feelings. Vampires here differ in many ways from their mythological counterparts, e.g., impaling them with a wooden stake through their heart will not kill them nor will shooting them with silver bullets, stabbing them with knifes, or exposing them to garlic, crosses, holy water, or even fire. They are extremely resilient, capable of withstanding multiple bullet hits and stab wounds. The only effective way to kill vampires here is to behead them or expose them to direct sunlight, which sets them on fire and rapidly burns them to ash. Large amounts of ultraviolet light will also burn them and probably can kill them, but they can never stay dead for long. If blood hits their ashes or dead bodies, they will regenerate.