In this podcast recording by LSHTM, Dr. Bayard Roberts, Director of the European Centre on Health of Societies in Transition (ECOHOST) and Senior Lecturer in Health Systems and Policy at LSHTM, discusses his work, which focuses on the health determinants, policies and systems of countries in transition such as conflict-affected and fragile states, with particular focus on mental health, other non-communicable diseases and harmful health behaviours.