Modeling the Spread of Porphyric Hemophilia Benjamin Ritz Department of Mathematics and Computer Science Porphyric Hemophilia is a blood-borne disease with devastating repercussions. The infected become gaunt and pale, acquire several severe allergies, and, perhaps worst of all, lust to feed on human blood. Better known as vampires, these infected spread the disease as they feed. In response to a growing popularity of vampires in recent years, we have constructed several mathematical models which represent the spread of vampirism through a human population. These models draw heavily on both popular culture and the occult folklore regarding vampires, and may shed some light on these creatures of the night. Class of 2013, Chemical Engineering, Clarkson University Honors, Dr. Kathleen Fowler