University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, Fudan University, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, Mariano Marcos Memorial Hospital and Medical Center, Vicente Sotto Memorial Medical Center, Vicente Sotto Memorial Medical Center, Davao Regional Medical Center, Research Institute for Tropical Medicine, Research Institute for Tropical Medicine, University of Oxford, Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS) and University of the Philippines, Manila - Institute of Child Health and Human Development

University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, affiliation not provided to SSRN, University of Illinois at Urbana-Champaign, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines, Manila - Institute of Child Health and Human Development, University of the Philippines Manila - Institute of Child Health and Human Development, Research Institute for Tropical Medicine, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of the Philippines, Manila - Institute of Child Health and Human Development and University of the Philippines, Manila - Institute of Child Health and Human Development

Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines-Manila, Department of Microbiology and Immunology, University of North Carolina School of Medicine, Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines, Department of Microbiology and Immunology, University of North Carolina School of Medicine, Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines-Manila, Department of Microbiology and Immunology, University of North Carolina School of Medicine, Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines-Manila, International Vaccine Institute, Department of Health, Philippines, International Vaccine Institute, Department of Microbiology and Immunology, University of North Carolina School of Medicine, University of the Philippines, Manila - Institute of Child Health and Human Development and Department of Microbiology and Immunology, University of North Carolina School of Medicine

Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines, Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines-Manila, Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines-Manila, University of the Philippines, Manila - Institute of Child Health and Human Development, Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines, Research Institute for Tropical Medicine, Sanofi Pasteur Vaccines Epidemiology and Modeling, Sanofi Pasteur Vaccines Epidemiology and Modeling, University of Illinois at Urbana-Champaign, University of the Philippines, Manila - Institute of Child Health and Human Development and Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines