Manitou Blood — Graham Masterton

A bizarre epidemic is sweeping New York City. Doctors can only watch as victims fall prey to a very unusual blood disorder. They become unable to eat solid food, are extremely sensitive to daylight--and they have an irresistible need to drink human blood.... As panic, bloodlust and death grip the city, a few begin to consider the unimaginable: Could the old folktales and legends be true? Could the epidemic be the work of...vampires? Their search for the truth will lead them to shadowy realms where very few dare to go. They will seek help from both the living and the dead. And they will realize that their worst fear was only the beginning.