David S Hui is the Chairman of Department of Medicine & Therapeutics and the Stanley Ho Professor of Respiratory Medicine at the Chinese University of Hong Kong (CUHK). He trained in Respiratory Medicine at the Prince of Wales Hospital, Randwick in 1992-94 before working as an associate physician at the RPAH Sleep Disorders Clinic in 1995-97 and as a locum staff specialist in Respiratory Medicine at St George Hospital in 1997. He joined the CUHK as an assistant professor in 1998 and worked at the Prince of Wales Hospital, HK where a major outbreak of SARS (over 200 cases) occurred in 2003. Since 2004, he has frequently served as an advisor to the WHO on the clinical management of emerging severe acute respiratory infections (SARI) including avian influenza, pandemic influenza, and MERS. He joined urgent WHO missions for the investigation of MERS outbreaks in Riyadh and South Korea in 2013 and 2015 respectively. Prof Hui has published over 280 peer-reviewed journal articles and 24 book chapters. His research interests include sleep disordered breathing, clinical management of SARI, safety of respiratory therapy in the post SARS era, and infection control/prevention of nosocomial infection.