Center for Family Health Research Zambia (CFHRZ), Government of Uganda - Uganda Virus Research Institute (UVRI), University of Nairobi, Kenya Medical Research Institute (KEMRI) - Kemri-Wellcome Trust Research Programme, IAVI, University of Oxford, IAVI, University of Oxford, MRC/UVRI & LSHTM Uganda Research Unit, University of Oxford, University of Nairobi, Center for Family Health Research Zambia (CFHRZ), IAVI, IAVI, Kenya Medical Research Institute (KEMRI) - Kemri-Wellcome Trust Research Programme, University of Oxford, IAVI, Imperial College London - IAVI Human Immunology Laboratory, Kenya Medical Research Institute (KEMRI) - Kemri-Wellcome Trust Research Programme, IAVI, University of Oxford, MRC/UVRI & LSHTM Uganda Research Unit, affiliation not provided to SSRN, Imperial College London - IAVI Human Immunology Laboratory, Center for Family Health Research Zambia (CFHRZ), Center for Family Health Research Zambia (CFHRZ), affiliation not provided to SSRN, Center for Family Health Research Zambia (CFHRZ), MRC/UVRI & LSHTM Uganda Research Unit, Medical Research Council/Uganda Virus Research Institute & London School of Hygiene and Tropical Medicine (MRC/UVRI & LSHTM), Kenya Medical Research Institute (KEMRI) - Kemri-Wellcome Trust Research Programme, International AIDS Vaccine Initiative, Imperial College London - IAVI Human Immunology Laboratory, Center for Family Health Research Zambia (CFHRZ), University of Nairobi, University of Nairobi, IAVI, Center for Family Health Research Zambia (CFHRZ), Center for Family Health Research Zambia (CFHRZ), London School of Hygiene & Tropical Medicine - Uganda Research Unit, University of Nairobi, MRC/UVRI & LSHTM Uganda Research Unit, Oxus Technologies Limited, University of Nairobi, Center for Family Health Research Zambia (CFHRZ), University of Nairobi, Center for Family Health Research Zambia (CFHRZ), Center for Family Health Research Zambia (CFHRZ), University of Nairobi, MRC/UVRI & LSHTM Uganda Research Unit, MRC/UVRI & LSHTM Uganda Research Unit, Kenya Medical Research Institute (KEMRI) - Kemri-Wellcome Trust Research Programme, IAVI, University of Nairobi, University of Nairobi, UVRI-IAVI HIV Vaccine Program, University of Nairobi, Kenya Medical Research Institute (KEMRI) - Kemri-Wellcome Trust Research Programme, IAVI, Kenya Medical Research Institute (KEMRI) - Kemri-Wellcome Trust Research Programme, University of California, San Francisco (UCSF) - Department of Medicine, IAVI, University of Nairobi, London School of Hygiene & Tropical Medicine - Uganda Research Unit, University of Oxford, Imperial College London - IAVI Human Immunology Laboratory, University of Oxford - The Jenner Institute, International AIDS Vaccine Initiative, Imperial College London - Department of Infectious Disease, University of Nairobi, London School of Hygiene & Tropical Medicine - Uganda Research Unit, Center for Family Health Research Zambia (CFHRZ), IAVI, Kenya Medical Research Institute (KEMRI) - Kemri-Wellcome Trust Research Programme and University of Oxford - The Jenner Institute

University of California, San Francisco (UCSF) - UCSF Medical Center, UC Davis School of Medicine, UCSF Division of Infectious Diseases, Department of Medicine, UCSF, Infectious Diseases Research Collaboration (Uganda), Makerere University, Makerere University, Chan Zuckerberg Initiative, Makerere University, University of California, San Francisco (UCSF) - Department of Medicine, Department of Epidemiology of Microbial Diseases, Yale School of Public Health and Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, University of California, San Francisco (UCSF) - UCSF Medical Center, Division of Pulmonary and Critical Care Medicine and Division of HIV, ID, and Global Medicine, Department of Medicine, UCSF, University of California, San Francisco (UCSF) - UCSF Medical Center, University of California, San Francisco (UCSF) - UCSF Medical Center, Makerere University, University of California, San Francisco (UCSF) - UCSF Medical Center, University of California, San Francisco - Division of Gastroenterology and Hepatology, Makerere University, University of California, San Francisco (UCSF) - UCSF Medical Center and University of California, San Francisco (UCSF) - Division of Infectious Diseases

University of California, San Francisco (UCSF) - The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco (UCSF) - Division of Experimental Medicine, University of California, San Francisco (UCSF) - Division of Experimental Medicine, University of California, San Francisco (UCSF) - Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco (UCSF) - Division of Experimental Medicine, University of California, San Francisco (UCSF) - Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco (UCSF) - The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco (UCSF) - The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, Los Angeles (UCLA) - Mattel Children’s Hospital UCLA, University of Wisconsin-Madison - Department of Pediatrics, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Institute for Computational Health Sciences, University of California, San Francisco (UCSF) - Institute for Computational Health Sciences, University of California, San Francisco (UCSF) - Division of Experimental Medicine and University of California, San Francisco (UCSF) - The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research

University of California, San Francisco (UCSF) - The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco (UCSF) - Division of Experimental Medicine, University of California, San Francisco (UCSF) - Division of Experimental Medicine, University of California, San Francisco (UCSF) - Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco (UCSF) - Division of Experimental Medicine, University of California, San Francisco (UCSF) - Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco (UCSF) - The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco (UCSF) - The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, Los Angeles (UCLA) - Mattel Children’s Hospital UCLA, University of Wisconsin-Madison - Department of Pediatrics, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Institute for Computational Health Sciences, University of California, San Francisco (UCSF) - Institute for Computational Health Sciences, University of California, San Francisco (UCSF) - Division of Experimental Medicine and University of California, San Francisco (UCSF) - The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research

University of California, San Francisco (UCSF) - Departments of Otolaryngology-Head and Neck Surgery and of Microbiology and Immunology, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Departments of Otolaryngology-Head and Neck Surgery and of Microbiology and Immunology, Vitalant Research Institute, Vitalant Research Institute, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Department of Medicine, Vitalant Research Institute, Vitalant Research Institute, University of California, San Francisco (UCSF) - Departments of Otolaryngology-Head and Neck Surgery and of Microbiology and Immunology and University of California, San Francisco (UCSF) - Department of Medicine