Julie Leask is professor in the Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, University of Sydney. Her research focuses on behavioural science in public health, specifically vaccination uptake, programs and policy. Professor Leask has a number of advisory roles with the World Health Organization including as chair of the Behavioural and Social Drivers of Vaccination working group. She is member of the Regional Vaccine Access and Health Security Initiative Expert Advisory Group for the Department of Foreign Affairs and Trade.