The University of Hong Kong - WHO Collaborating Centre for Infectious Disease Epidemiology and Control, The Chinese University of Hong Kong (CUHK) - Department of Medicine & Therapeutics, Princess Margaret Hospital - Department of Medicine, Queen Elizabeth Hospital, Hong Kong - Department of Paediatrics, Princess Margaret Hospital - Department of Paediatric and Adolescent Medicine, The University of Hong Kong, The University of Hong Kong, The University of Hong Kong, The University of Hong Kong - School of Public Health, The University of Hong Kong - School of Public Health, The University of Hong Kong - School of Public Health, The University of Hong Kong - School of Public Health and The University of Hong Kong - School of Public Health

The University of Hong Kong - WHO Collaborating Centre for Infectious Disease Epidemiology and Control, Princess Margaret Hospital - Department of Paediatric and Adolescent Medicine, affiliation not provided to SSRN, The University of Hong Kong - WHO Collaborating Centre for Infectious Disease Epidemiology and Control, Princess Margaret Hospital, The University of Hong Kong, The University of Hong Kong - School of Public Health, The University of Hong Kong - WHO Collaborating Centre for Infectious Disease Epidemiology and Control and The University of Hong Kong

The University of Hong Kong - State Key Laboratory of Emerging Infectious Diseases, Government of the Hong Kong Special Administrative Region - Hospital Authority, The University of Hong Kong - Queen Mary Hospital, affiliation not provided to SSRN, The University of Hong Kong, affiliation not provided to SSRN, The University of Hong Kong - Department of Microbiology, The University of Hong Kong - State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong - State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong - State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong - State Key Laboratory of Emerging Infectious Diseases, affiliation not provided to SSRN, affiliation not provided to SSRN, Princess Margaret Hospital - Department of Paediatric and Adolescent Medicine, affiliation not provided to SSRN, The University of Hong Kong - State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong - Department of Mechanical Engineering and The University of Hong Kong - State Key Laboratory of Emerging Infectious Diseases