1. Oxford Vaccine Group, Department of Paediatrics University of Oxford Oxford UK
2. UK Chinese Academy of Medical Science (CAMS) Oxford Institute University of Oxford Oxford UK
3. HKU‐Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine The University of Hong Kong Hong Kong City Hong Kong
4. Lymphoid Malignancies Branch, Center for Cancer Research National Cancer Institute, National Institutes of Health Bethesda USA
5. Division of Public Health Laboratory Sciences, School of Public Health, Li Ka Shing Faculty of Medicine The University of Hong Kong Hong Kong City Hong Kong
6. Centre for Immunology & Infection Hong Kong Science Park Shatin Hong Kong
7. Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity University of Melbourne Melbourne VIC Australia