1. School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China
2. WHO Collaborating Center for Surveillance, Epidemiology and Control of Influenza, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
3. WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China
4. Laboratory of Data Discovery for Health Limited (D24H), Hong Kong Science Park, Hong Kong SAR, China
5. University of Hong Kong, Shenzhen Hospital, Shenzhen, China
6. Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
7. Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital and Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China
8. Francis Crick Institute, Crick Worldwide Influenza Centre, WHO Collaborating Centre for Reference and Research on Influenza, London, UK
9. Centre for Immunology and Infection (C2I), Hong Kong Science Park, Hong Kong SAR, China