Erica Nelson is a historian and anthropologist of global health, combining longitudinal approaches to understanding change in health systems with participatory, ethnographic, and visual methods. She has worked in this field since receiving her PhD in 2008 (University of Wisconsin-Madison). She was a post-doctoral Research Fellow (University of Amsterdam, Institute for Social Science Research (2010–14)), leading the qualitative component of an adolescent sexual and reproductive health intervention in Bolivia, Nicaragua, and Ecuador. She is currently a researcher in the Accountability for Health Equity programme at IDS. Erica is the executive producer of all multimedia content in this issue.