Sarah Buchan is a Scientist at Public Health Ontario (PHO) in Health Protection where she conducts applied public health research related to the epidemiology of vaccine-preventable and other infectious diseases. Her interests include studying the burden of respiratory viruses in high-risk populations, assessing vaccine effectiveness, and estimating vaccine coverage. She currently holds funds to study the burden of RSV in Ontario in order to prepare for potential immunization strategies. Since 2020, she has been supporting PHO’s COVID-19 Incident Management System and has contributed to analyses related to COVID-19 burden, transmission, variants of concern, immunization, and vaccine effectiveness in order to inform decision making.