Dr. McGeer trained in internal medicine and infectious diseases at the University of Toronto, then completed a fellowship in hospital epidemiology at Yale New Haven Hospital in 1989/90. She was the director of infection control at Sinai Health System in Toronto fro 1990-2019. She is a microbiologist and infectious disease consultant at the Mount Sinai Hospital and a Professor in Laboratory Medicine and Pathobiology at the University of Toronto. Her research interests are in prevention and management of healthcare associated infection, the epidemiology of respiratory viral infections, antimicrobial resistance and adult immunization. She is a member of the influenza and pneumococcal working groups of Canada’s National Advisory Committee on Immunization and of the Ontario Advisory Committee on Immunization, and was a member of the Ontario Science Table from 2020-2023.