Kathleen Kahn is personal professor in the School of Public Health at the University of the Witwatersrand; and senior scientist in the MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt). Her research interests include health transitions; burden of disease assessments; child health and development; integrated chronic care systems; and interventions to reduce risk factors for metabolic disease. Since the inception of the Agincourt health and socio-demographic surveillance system in 1992, Kahn has led work on mortality and cause of death measurement, using verbal autopsy to track transitions over a period of dramatic socio-political change and the HIV epidemic.