Julie Leask is a public health researcher who studies what people think, feel and do about vaccination. She leads a program of research focused on responding to vaccine hesitancy and refusal, and strengthening vaccination programs and policy. She holds a PhD (2003) and Master of Public Health (1998) from the University of Sydney. She was inaugural chair of the Collaboration On Social Science in Immunisation (COSSI) and is a visiting senior research fellow at the National Centre for Immunisation Research and Surveillance. She is also a member of the Tailoring Immunisation Programme Advisory Group of Experts for the WHO European Office. In 2015 Julie won the Public Health Impact Award and the Sax Institute Research Action Award.