London School of Hygiene & Tropical Medicine - Faculty of Epidemiology and Population Health, KEMRI-Wellcome Trust, Johns Hopkins University - Department of International Health, International Vaccine Access Center, Thailand Ministry of Public Health–US Centers for Disease Control and Prevention Collaboration - Global Disease Detection Center, Johns Hopkins University - Department of International Health, International Vaccine Access Center, Johns Hopkins University - Department of International Health, International Vaccine Access Center, Johns Hopkins University - International Vaccine Access Center, Thailand Ministry of Public Health–US Centers for Disease Control and Prevention Collaboration - Global Disease Detection Center, Johns Hopkins University - Department of International Health, International Vaccine Access Center, Charles Darwin University - Menzies School of Health Research, Johns Hopkins University - Department of International Health, International Vaccine Access Center, University of Auckland, University of Maryland - Department of Pediatrics, University of Maryland - Department of Pediatrics, Johns Hopkins University - Department of International Health, International Vaccine Access Center, Chris Hani Baragwanath Academic Hospital - Vaccines and Infectious Diseases Analytics Research Unit, University of Otago - Department of Pathology and Biomedical Sciences, World Health Organization (WHO), Boston University - Department of Global Health, University of the Witwatersrand - Vaccines and Infectious Diseases Analytics Research Unit, Medical Research Council Unit The Gambia at London School of Hygiene & Tropical Medicine, KEMRI-Wellcome Trust, University of the Witwatersrand, Boston University - Department of Global Health, Medical Research Council Unit The Gambia at London School of Hygiene & Tropical Medicine, Boston University - Department of Global Health and Development, Centre pour le Développement des Vaccins (CVD-Mali), Thailand Ministry of Public Health–US Centers for Disease Control and Prevention Collaboration - Global Disease Detection Center and London School of Hygiene & Tropical Medicine - Department of Infectious Disease and Epidemiology