9780763729325. New condition. Trade paperback. Language: English. Pages: 639. Trade paperback (US). Glued binding. 639 p. Contains: Tables, black & white, Maps, Figures. Understanding Viruses is the ideal text for the modern undergraduate virology course. Each chapter contains pathobiology, molecular biology, history, epidemiology, and current issues as it pertains to a specific viral disease all arranged together for easy study.