Karen Hofman is based at the Wits School of Public Health and is founding Director of PRICELESS SA (Priority Cost Effective Lessons for Systems Strengthening). She leads policy research to evaluate interventions that provide the biggest return on investment within health systems and across other sectors. The Minister of Health adopted PRICELESS evidence on Best Buys for Maternal and Child Health for the MDG countdown. Karen has led research on SA vaccine catch up campaigns. A Wits medical graduate and a paediatrician, Karen was on faculty at Johns Hopkins and subsequently the Policy Director at the NIH Fogarty Center. She is a member of the Academy of Science of South Africa (ASSAf) and in 2016 received the Public Health Association of SA Annual Award.