Paul K.S. Chan is a Clinical Professor at the Department of Microbiology, and Deputy Director of the Stanley Ho Centre for Emerging Infectious Diseases, Faculty of Medicine, The Chinese University of Hong Kong. He is also an Honorary Consultant in Microbiology for the New Territories East Cluster Hospitals of the Hong Kong Hospital Authority. Professor Chan is a renowned clinical virologist with special interest in viral epidemiology, pathogenesis, and oncogenesis. He is currently a visiting professor of the Royal Veterinary College, University of London; and the College of Life Science and Bioengineering, Beijing University of Technology. He also serves many key professional bodies in Hong Kong, including the Scientific Committee on Emerging and Zoonotic Diseases of the Centre for Health Protection, the Grant Review Board for Research Fund for the Control of Infectious Diseases, the Advisory Council on Food and Environmental Hygiene, Working Groups for Human Papillomavirus and Rotavirus Vaccines, and the Hong Kong College of Pathologists Examiner Committee. Internationally, Professor Chan is the Vice-Chairman of Asia-Pacific Alliance for the Control of Influenza, a partner of the Global Outbreak Alert and Response Network, and has served as a short-term consultant on influenza for the World Health Organization. Professor Chan has published 11 book chapters and more than 250 papers on clinical virology.