About the Authors

Joseph T. Wu

joewu@hku.hk

Affiliation Department of Community Medicine and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

Kathy Leung

Affiliation Department of Community Medicine and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

Ranawaka A. P. M. Perera

Affiliation Centre of Influenza Research and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

Daniel K. W. Chu

Affiliation Centre of Influenza Research and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

Cheuk Kwong Lee

Affiliation Hong Kong Red Cross Blood Transfusion Service, Hospital Authority, Hong Kong Special Administrative Region, People's Republic of China

Ivan F. N. Hung

Affiliation Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

Che Kit Lin

Affiliation Hong Kong Red Cross Blood Transfusion Service, Hospital Authority, Hong Kong Special Administrative Region, People's Republic of China

Su-Vui Lo

Affiliations Hospital Authority, Hong Kong Special Administrative Region, People's Republic of China, Food and Health Bureau, Government of the Hong Kong Special Administrative Region, Hong Kong Special Administrative Region, People's Republic of China

Yu-Lung Lau

Affiliation Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

Gabriel M. Leung

Affiliation Department of Community Medicine and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

Benjamin J. Cowling

Affiliation Department of Community Medicine and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

J. S. Malik Peiris

Affiliations Centre of Influenza Research and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China, HKU-Pasteur Research Pole, Centre of Influenza Research and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China

Competing Interests

I have read the journal's policy and have the following conflicts: BJC has received research funding from MedImmune Inc., and BJC and JSMP consults for Crucell NV. GML has received speaker honoraria from HSBC and CLSA. The authors report no other potential conflicts of interest. This does not alter our adherence to all PLOS policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JTW BJC GML JSMP. Analyzed the data: JTW KL. Wrote the paper: JTW. Collected data: JTW KL RAPMP DKWC CKLee IFNH CKLin SVL YLL GML BJC JSMP. Laboratory testing: RAPMP DKWC. Interpreted results: JTW KL BJC GML JSMP.