Dr Tracey Chantler is an Associate Professor in Public Health Evaluation at the London School of Hygiene and Tropical Medicine (LSHTM) and the Vaccine Centre Co-Director. Tracey trained as a nurse and gained expertise in medical anthropology and ethics during her PhD. Tracey has a wide range of programmatic and immunisation related research experience. This includes implementing childhood immunization programmes in rural Haiti, supporting paediatric clinical vaccine trials in England, and conducting health systems related ethnographic, qualitative and mixed methods research in England, China and East Africa. Her health systems research investigates the interface between the provision of vaccination programmes and public experience of these services with a specific focus on addressing vaccine inequalities. Tracey teaches on medical anthropology and social science master's level modules and is the LSHTM Programme Director for the MSc in Health Policy, Planning and Financing, a joint programme offered by LSHTM and the London School of Economics & Political Science.