University of Indonesia (UI) - Faculty of Medicine, University of Indonesia (UI) - Faculty of Medicine, University of Indonesia (UI) - Faculty of Medicine, affiliation not provided to SSRN, affiliation not provided to SSRN, The Indonesian Technical Advisory Group on Immunization, London School of Hygiene & Tropical Medicine - Department of Infectious Disease and Epidemiology, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Indonesia (UI) - Faculty of Medicine, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Indonesia (UI) - Faculty of Medicine, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Indonesia (UI), affiliation not provided to SSRN, Padjadjaran University - Faculty of Medicine, University of Melbourne - Murdoch Children's Research Institute, University of Melbourne - Murdoch Children's Research Institute, affiliation not provided to SSRN, National Institute of Health Research & Development, Indonesia, National Institute of Health Research & Development, Indonesia, Dr. Hasan Sadikin Hospital, The Indonesian Technical Advisory Group on Immunization, Jakarta Provincial Department of Health and Padjadjaran University - Faculty of Medicine