This is a symposium in honor of Dr. James Cassedy, historian, History of Medicine Division, National Library of Medicine, for his contributions to the library, the division, and to the history of medicine. Dr. Philip Teigen, deputy chief, History of Medicine Division, served as moderator. A series of five lectures were presented. Each lecture is about 35 minutes long. Dr. Philip Curtin, The Johns Hopkins University, presents a lecture titled "Yellow Fever as a Public Health Problem in 19th Century West Africa." Alan Kraut, American University, speaks on "When the Truth was not Enough: Joseph Goldberger and the Pursuit of Public Health." Carolyn Hanaway, researcher at the Office of the NIH Historian, discusses "The Approach to Epidemics: the Scientists' Perspective, Past and Present." Victoria Harden, NIH Historian, reports on "Yellow Fever, the End of the Story?: Mason V. Hargett & the Development of an Aqueous-Based Vaccine During World War II." Finally, John Parascandola, U.S. Public Health Service Historian and former chief of the History of Medicine Division, looks at "Syphilis at the Cinema: The U.S. Public Health Service VD Films of the 1930s and 40s." The films he describes are Know for Sure, A Venereal Disease Rapid Treatment Center, and To the People of the United States. All of the speakers took questions.