Dr. Katzenstein completed his undergraduate and medical degrees as well as a residency in Internal Medicine and Fellowship training in Infectious Diseases at the University of California San Diego. He continued fellowship training in virology and Infectious Diseases with Dr. Colin Jordan at U.C. Davis, moving to the University of Minnesota to a faculty position in Infectious Disease in 1984. He was a visiting lecturer for two years in the Departments of Medical Microbiology and Medicine at the University University of Zimbabwe as the AIDS epidemic was first recognized in Southern Africa. In 1987, he returned to the U.S. to take up a senior research fellowship at the Center for Biologics Evaluation and Research (CBER) at the Food and Drug Administration in the Vaccine Branch, evaluating early candidate HIV Vaccines and diagnostics. Dr. Katzenstein returned to California in 1989 to work with Dr. Thomas Merigan and the AIDS Clinical Trials Group. He continues an active collaboration with his colleagues in Zimbabwe and Southern Africa in prevention, perinatal transmission and vaccine research. At Stanford, Dr. Katzenstein participates in studies of multiple drugs and drug combinations in Clinical Trials in the U.S. and Europe and is the principal investigator for Stanford’s Virology Service Laboratory in the center for AIDS Research. At Stanford he teaches an undergraduate course in Global AIDS, attends on the Infectious Disease service and supervises both laboratory and clinical fellows conducting AIDS Research. He remains actively involved in studies of HIV infection in Zimbabwe, spending 2-3 months a year in Southern Africa.