Charles T. Ambrose earned his M.D. from the Johns Hopkins School of Medicine and pursued research in cellular immunology@Harvard Medical School and@INSERM in Paris for 14 years. He now teaches pathogenic microbiology@the University of Kentucky. He has published widely on the history of medicine and recently on aging and Alzheimer’s disease. Address: Dept of Microbiology, College of Medicine, University of Kentucky, Lexington, KY 40536. E-mail: cambros@uky.edu