John de Wit (MSc, PhD) is professor of Interdisciplinary Social Science: Public Health at Utrecht University. John is a social psychologist by training who has worked across the social sciences and public health and health promotion for over 30 years. Much of John’s work is related to the global HIV response and key populations. John’s research interests encompass HIV prevention as well as the health wellbeing of people living with HIV. In the context of the Ndlovu Research Consortium he undertakes research regarding the success of antiretroviral treatment of HIV, including treatment adherence and retention in care.