The University of Hong Kong - WHO Collaborating Centre for Infectious Disease Epidemiology and Control, The Chinese University of Hong Kong - 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 - School of Public Health, The Chinese University of Hong Kong (CUHK) - School of Public Health and Primary Care, The University of Hong Kong - School of Public Health, Prince of Wales Hospital - The Chinese University of Hong Kong, North Lantau Hospital - Department of Pathology, St Jude Children’s Research Hospital, St Jude Children’s Research Hospital, Johns Hopkins University - Department of Molecular Microbiology and Immunology, The University of Hong Kong - School of Public Health, The University of Hong Kong - School of Public Health, Prince of Wales Hospital - The Chinese University of Hong Kong, The University of Hong Kong - School of Public Health, The Chinese University of Hong Kong (CUHK) - Department of Medicine and Therapeutics, The University of Hong Kong - School of Public Health, The Chinese University of Hong Kong (CUHK) - Department of Medicine and Therapeutics, Johns Hopkins University - Department of Molecular Microbiology and Immunology, The University of Hong Kong - School of Public Health, The Chinese University of Hong Kong - Department of Medicine & Therapeutics and The University of Hong Kong - School of Public Health

The University of Hong Kong - School of Public Health, The University of Hong Kong, The University of Hong Kong - School of Public Health, The University of Hong Kong - School of Public Health, Hong Kong Red Cross Blood Transfusion Service, The University of Hong Kong, The University of Hong Kong, The University of Hong Kong - School of Public Health, The University of Hong Kong, The University of Hong Kong, The University of Hong Kong, Ishikawa Prefectural University - Research Institute for Bioresources and Biotechnology, Shenzhen Bay Laboratory (SZBL), The Chinese University of Hong Kong (CUHK) - Department of Medicine and Therapeutics, The Chinese University of Hong Kong - Department of Medicine & Therapeutics, Washington University in St. Louis - Department of Molecular Microbiology, 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 - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - HKU-Pasteur Research Pole, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - School of Public Health, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, 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, 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 - Department of Pediatrics & Adolescent Medicine, Ishikawa Prefectural University - Research Institute for Bioresources and Biotechnology, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine, The University of Hong Kong - School of Public Health, The University of Hong Kong - School of Public Health, The University of Hong Kong - Department of Pediatrics & Adolescent Medicine and The University of Hong Kong - Department of Pediatrics & Adolescent Medicine