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