John Kaldor is a National Health and Medical Research Council Senior Principal Research Fellow. He holds a doctorate in biostatistics from the University of California. Berkeley, and began his research career at the International Agency for Research on Cancer in Lyon, France. For over 25 years he has built and led internationally recognised research programs on the epidemiology and prevention of HIV infection and other sexually transmitted and bloodborne infections. His research has covered a wide range of projects, including the development and implementation of public health surveillance systems, investigations of HIV-related cancer, cohort and cross-sectional investigations of risk factors for infectious disease transmission, and interventional trials of disease prevention strategies. His work has had a particular focus on populations experiencing health disadvantage, both in Australia and in the Asia-Pacific region. With over 500 peer reviewed scientific publications that have been cited collectively over 17,000 times, Professor Kaldor has been a highly influential contributor to public health knowledge. His work has guided policy in disease control, particularly in relation to the prevention of HIV infection. Professor Kaldor has also served on numerous policy and advisory committees in Australia and Internationally. He has had close working relationships with public health programs in a number of countries of the Asia-Pacific region, particularly Cambodia, Indonesia and Papua New Guinea. Professor Kaldor is a past President of the Australasian Epidemiological Association, and currently serves as a ministerially appointed member of the Repatriation Medical Authority.