Dr. David Katzenstein was a Professor of Infectious Diseases Emeritus at the Stanford School of Medicine. He co-founded and served as the Principal Investigator of the Zimbabwe AIDS Prevention Project, a community-based research organization. He conducted HIV-related research throughout the United States, Africa, and Asia. His recent laboratory and clinical efforts spanned the AIDS Clinical Trials Group and HIV Prevention Trials Network. He focused on prevention of viral evolution, mother-to-child-transmission, and drug resistance in the context of scaling-up antiretroviral drug treatment for AIDS in Africa and Asia. He held an M.D. from the University of California San Diego School of Medicine.