University of Auckland, University of Auckland, University of Auckland - Paediatric Department and University of Auckland

affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Government of the People's Republic of China - Ministry of Health, affiliation not provided to SSRN, affiliation not provided to SSRN, Institute for Clinical Evaluative Sciences (ICES), Queen's University - Institute for Clinical Evaluative Sciences, British Columbia Centre for Disease Control, affiliation not provided to SSRN, Ministry of Health - National Immunization Program, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of British Columbia (UBC) - School of Population and Public Health, University of Auckland, Queen's University - Institute for Clinical Evaluative Sciences, affiliation not provided to SSRN, The University of Hong Kong - University of Hong Kong, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Auckland, University of Auckland, University of Melbourne - Murdoch Children's Research Institute, University of Cincinnati and University of Melbourne