Sherrie Kelly is an infectious disease modeller specializing in applied health economics. She has over 15 years of experience working with countries across all income levels and global regions, as well as with a wide range of national and international organizations. Dr Kelly has a background in epidemiology and global health with a focus on HIV, TB and maternal and child health. She leads the Burnet Institute's Optima group on HIV, TB and malaria modelling applications and research and also facilitates Optima training workshops and country missions. Prior to joining the Optima team, Dr Kelly worked with UNAIDS and with the Public Health Agency of Canada, having experience in infectious disease emergency response and basic laboratory research.