Sandra Mounier-Jack is a senior lecturer in health policy at the London School of Hygiene and Tropical Medicine, specializing in health systems, vaccine policy and vaccination program implementation. She is currently leading in a five year program evaluating the delivery of the English vaccination program and is working on a comprehensive review of lessons learned from HPV vaccine introduction demonstration projects in low and middle income countries. She has been a member of the GAVI Independent Review Committee since 2012.