Discusses the biology, history, ecology, and social impact of human plagues, including Aids, smallpox, polio, bubonic plague, tuberculosis, leprosy, the impact of the Irish potato blight, and emerging human pathogens. The biology of pathogens and the human immune responses are treated in detail. Discusses the impact of molecular biology on curtailing the impact of diseases. For nonmajors. Approved for GT-SC2. Approved for arts and sciences core curriculum: natural science.