1. Department of Clinical Immunology, Microbiology and Immunology, Institute of Infection and Global Health, University of Liverpool
2. Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine
3. Vaccines and Immunity Theme, Medical Research Council Unit, Banjul, The Gambia
4. Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Queen Elizabeth Central Hospital, Blantyre, Malawi
5. Microbiology and Infection Unit, Warwick Medical School, University of Warwick, Coventry, United Kingdom