Longitudinal Studies

    By Stephen Tollman, University of the Witwatersrand and Kathleen Kahn, University of the Witwatersrand   In 1992 a group of academics from the University of the Witwatersrand introduced a health and socio-demographic surveillance system in remote, rural South Africa to track and understand health and wellbeing in these environments. This initiative built on pioneering work by a Wits team to establish a health systems development unit in a […]