Professor Kelvin To is the Chairperson of the Department of Microbiology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, the University of Hong Kong. He specialises in clinical microbiology and virology. His work has contributed to the understanding of the virology and epidemiology of influenza virus and the evolution, clinical manifestation, and immunological properties of severe acute respiratory syndrome virus coronavirus 2 (SARS-CoV-2).