Dr Delan Devakumar is an Associate Professor in Child and Adolescent Health in the UCL Institute for Global Health and an Honorary Consultant in Public Health. He worked in clinical paediatrics in the UK and New Zealand, and then in humanitarian contexts with Medecins Sans Frontieres in Pakistan, South Sudan and Myanmar. His research focuses on child and adolescent health in a number of areas including migration, child nutrition, air pollution, child marriage, and conflict and violence. He is currently working in Brazil, Lebanon and in South Asia. He is a Commissioner and on the steering group of the UCL-Lancet Commission on Migration and Health