Section of Immunology, Wright-Fleming Institute, Imperial College School of Medicine, London, United Kingdom.|Section of Immunology, Wright-Fleming Institute, Imperial College School of Medicine, London, United Kingdom.|Centre for Integrative Systems Biology and Bioinformatics, South Kensington Campus, Imperial College, London, United Kingdom.|Section of Immunology, Wright-Fleming Institute, Imperial College School of Medicine, London, United Kingdom, Department of Molecular and Cellular Epigenetics, University of Liège, Liège, Belgium.|Section of Paediatrics, Wright-Fleming Institute, Imperial College School of Medicine, London, United Kingdom.|Vaccine Research Center, National Institutes of Health, Bethesda, Maryland, United States of America.|Section of Paediatrics, Wright-Fleming Institute, Imperial College School of Medicine, London, United Kingdom.|Vaccine Research Center, National Institutes of Health, Bethesda, Maryland, United States of America.|Vaccine Research Center, National Institutes of Health, Bethesda, Maryland, United States of America, Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, Wales, United Kingdom.|Section of Immunology, Wright-Fleming Institute, Imperial College School of Medicine, London, United Kingdom.|Section of Immunology, Wright-Fleming Institute, Imperial College School of Medicine, London, United Kingdom.