University of Oxford - Oxford Vaccine Group, University of Siena - Institute of Global Health, University of the Witwatersrand - South African Medical Research Council Vaccines and Infectious Diseases Analytical Research Unit, Federal University of Sao Paulo, University of Oxford - The Jenner Institute, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - The Jenner Institute, University of the Witwatersrand, Soweto Clinical Trials Centre, Soweto Clinical Trials Centre, University of Oxford - Centre for Vaccinology and Tropical Medicine, Setshaba Research Centre, University of Oxford - The Jenner Institute, University of Oxford - Centre for Vaccinology and Tropical Medicine, Liverpool School of Tropical Medicine - Department of Clinical Sciences, University of the Witwatersrand - South African Medical Research Council Vaccines and Infectious Diseases Analytical Research Unit, University of Sheffield - Department of Infection, Immunity and Cardiovascular Disease, University of Cape Town (UCT) - Centre for Lung Infection and Immunity, University of Oxford - Jenner Institute, Newcastle upon Tyne Hospitals NHS Foundation Trust - Department of Infection and Tropical Medicine, University of Oxford - Oxford Vaccine Group, University of Oxford - The Jenner Institute, University of Oxford - The Jenner Institute, Wits Reproductive Health & HIV Institute (WRHI), University of Southampton - NIHR Southampton Clinical Research Facility and Biomedical Research Centre, University of Oxford - Oxford Vaccine Group, Liverpool School of Tropical Medicine - Department of Clinical Sciences, University Hospitals Bristol and Weston NHS Foundation Trust, University of London - St George's Vaccine Institute, University College London - Department of Infection, University of Oxford - Clinical BioManufacturing Facility, University Hospitals Birmingham NHS Foundation Trust, University of Oxford - Oxford Vaccine Group, University of the Witwatersrand - South African Medical Research Council, Liverpool School of Tropical Medicine - Department of Clinical Sciences, AstraZeneca Pharmaceuticals, University of the Witwatersrand - South African Medical Research Council, University of Oxford - The Jenner Institute, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of the Witwatersrand - South African Medical Research Council, University of the Witwatersrand - South African Medical Research Council, University Hospitals Bristol - University Hospitals Bristol and Weston NHS Foundation Trust, NIHR UCLH Clinical Research Facility, Hull University Teaching Hospitals NHS Trust, University of Oxford - Centre for Vaccinology and Tropical Medicine, AstraZeneca Pharmaceuticals, Braziland Hospital São Rafael - Escola Bahiana de Medicina e Saúde Pública, Universidade Federal do Rio Grande do Norte (UFRN), University of Oxford - The Jenner Institute, London Northwest University Healthcare, University of Oxford - Oxford Vaccine Group, University of the Witwatersrand - Perinatal HIV Research Unit, Setshaba Research Centre, University of Oxford - Oxford Vaccine Group, Hospital Quinta D'OR, University of Oxford - Oxford Vaccine Group, NIHR Imperial Clinical Research Facility, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, Hospital Universitário de Santa Maria, University of Glasgow - College of Medical, Veterinary & Life Sciences, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - Centre for Vaccinology and Tropical Medicine, Universidade Federal do Rio Grande do Sul, Western General Hospital - Clinical Infection Research Group, MRC-University of Glasgow Centre for Virus Research, University of Cambridge - Department of Medicine, Royal Papworth HospitalUniversity of Cambridge - Heart and Lung Research Institute, Nottingham University Hospitals NHS Trust, AstraZeneca Biopharmaceuticals, AstraZeneca Pharmaceuticals, AstraZeneca Pharmaceuticals, Anuerin Bevan University Health Board, University of Oxford - The Jenner Institute, University of Oxford - The Jenner Institute, University of Oxford - The Jenner Institute, University of Oxford - Centre for Vaccinology and Tropical Medicine and Independent

University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - Oxford Vaccine Group, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, Public Health England Colindale, Government of the United Kingdom - Public Health Scotland, Liverpool School of Tropical Medicine - Department of Clinical Sciences, Liverpool School of Tropical Medicine - Department of Clinical Sciences, Liverpool School of Tropical Medicine - Department of Clinical Sciences, University Hospitals Birmingham NHS Foundation Trust, Public Health England - National Infection Service, University of London - Institute of Infection and Immunity, University of Southampton - NIHR Southampton Clinical Research Facility and Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust, University of Oxford - The Jenner Institute, Government of the United Kingdom - North Bristol NHS Trust, NIHR UCLH Clinical Research Facility, Public Health England - Immunisation, Hepatitis, and Blood Safety Department, University of Southampton - University Hospital Southampton NHS Foundation Trust, Nottingham University Hospitals NHS Trust, Imperial College London - National Heart & Lung Institute, University of Nottingham - Division of Epidemiology and Public Health, University of Oxford - Centre for Vaccinology and Tropical Medicine and Independent

University of Oxford - Oxford Vaccine Group, University of Oxford - Big Data Institute, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Cambridge, University of Oxford - The Jenner Institute, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Cambridge, University of Oxford - Wellcome Centre for Human Genetics, University of Oxford - The Jenner Institute, Public Health England - National Infection Service, University of Oxford - Centre for Vaccinology and Tropical Medicine, Liverpool School of Tropical Medicine - Department of Clinical Sciences, UK Biocentre, University of Sheffield - Department of Infection, Immunity and Cardiovascular Disease, University of Oxford - Oxford Vaccine Group, University of Oxford - Jenner Institute, Newcastle upon Tyne Hospitals NHS Foundation Trust - Department of Infection and Tropical Medicine, University of Oxford - The Jenner Institute, University of Oxford - The Jenner Institute, University of Southampton - NIHR Southampton Clinical Research Facility and Biomedical Research Centre, Liverpool School of Tropical Medicine - Department of Clinical Sciences, University of Oxford - Oxford Vaccine Group, University Hospitals Bristol and Weston NHS Foundation Trust, University of Oxford - The Jenner Institute, University of Oxford - Jenner Institute, University of London - St George's Vaccine Institute, University College London - Department of Infection, University of Oxford - Clinical BioManufacturing Facility, University Hospitals Birmingham NHS Foundation Trust, University of Oxford - Oxford Vaccine Group, Public Health England - National Infection Service, University of London - Institute of Infection and Immunity, Queen Elizabeth University Hospital, Liverpool School of Tropical Medicine - Department of Clinical Sciences, University of Oxford - The Jenner Institute, University of Oxford - Centre for Vaccinology and Tropical Medicine, University Hospitals Bristol - University Hospitals Bristol and Weston NHS Foundation Trust, NIHR UCLH Clinical Research Facility, Hull University Teaching Hospitals NHS Trust, University of Cambridge, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - The Jenner Institute, London Northwest University Healthcare, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, NIHR Imperial Clinical Research Facility, University of Oxford - Oxford Vaccine Group, University of Glasgow - College of Medical, Veterinary & Life Sciences, University of Oxford - Centre for Vaccinology and Tropical Medicine, University of Oxford - Centre for Vaccinology and Tropical Medicine, Western General Hospital - Clinical Infection Research Group, MRC-University of Glasgow Centre for Virus Research, Royal Papworth HospitalUniversity of Cambridge - Heart and Lung Research Institute, Nottingham University Hospitals NHS Trust, AstraZeneca Biopharmaceuticals, AstraZeneca Pharmaceuticals, Anuerin Bevan University Health Board, University of Oxford - The Jenner Institute, University of Oxford - The Jenner Institute, University of Oxford - The Jenner Institute, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, University of Oxford - Centre for Vaccinology and Tropical Medicine, Independent and Independent

University Hospitals Bristol - University Hospitals Bristol and Weston NHS Foundation Trust, University of Bristol, University Hospitals Bristol, Cardiff University, University of Bristol, University Hospitals Bristol, Government of the United Kingdom - Royal United Hospitals Bath NHS Foundation Trust, Government of the United Kingdom - National Health Service (NHS), Government of the United Kingdom - Royal United Hospitals Bath NHS Foundation Trust, Public Health England - National Infection Service, University of Bristol, University of Bristol, University of Bristol, University of Bristol, National Health Service, United Kingdom, NIHR UCLH Clinical Research Facility, University Hospitals Bristol - University Hospitals Bristol and Weston NHS Foundation Trust, University Hospitals Bristol - University Hospitals Bristol NHS Foundation Trust, Government of the United Kingdom - National Health Service (NHS), Government of the United Kingdom - National Health Service (NHS), Government of the United Kingdom - Great Western Hospitals, The Alverton Practice, University of Bristol, University of Bristol, University of Oxford - Centre for Vaccinology and Tropical Medicine, Government of the United Kingdom - National Health Service (NHS), Government of the United Kingdom - National Health Service (NHS), University of Nottingham - Division of Epidemiology and Public Health, University Hospitals Bristol and Weston NHS Foundation Trust, University of Bristol and Independent

University of Bristol - Population Health Sciences, University of Bristol - Population Health Sciences, Southmead Hospital - Academic Respiratory Unit, University Hospitals Bristol NHS Foundation Trust - Clinical Research and Imaging Centre, Southmead Hospital - North Bristol NHS Trust, University Hospitals Bristol NHS Foundation Trust - Clinical Research and Imaging Centre, University Hospitals Bristol NHS Foundation Trust - Clinical Research and Imaging Centre, University Hospitals Bristol NHS Foundation Trust - Clinical Research and Imaging Centre, Southmead Hospital - North Bristol NHS Trust, Southmead Hospital - North Bristol NHS Trust, Southmead Hospital - North Bristol NHS Trust, University of Bristol - Population Health Sciences, University of Bristol - Population Health Sciences, University of Bristol - Population Health Sciences, University of Bristol - Population Health Sciences, University of Bristol - Population Health Sciences, University of Bristol - Engineering Mathematics and University Hospitals Bristol and Weston NHS Foundation Trust

University of Bristol - Population Health Sciences, University of Bristol - Department of Mathematics, Pfizer, Inc., Pfizer, Inc., University Hospitals Bristol NHS Foundation Trust - Clinical Research and Imaging Centre, Government of the United Kingdom - North Bristol NHS Trust, University of Bristol - Department of Population Health Sciences, University of Bristol - Population Health Sciences, University of Bristol - Department of Population Health Sciences, Pfizer, Inc., Pfizer, Inc., University of Bristol, Pfizer, Inc., Pfizer, Inc., Pfizer, Inc., Pfizer, Inc., University of Bristol - Department of Population Health Sciences, Government of the United Kingdom - North Bristol NHS Trust, Pfizer, Inc., University of Bristol - Engineering Mathematics and University Hospitals Bristol and Weston NHS Foundation Trust