London School of Hygiene & Tropical Medicine, National Health Research and Training Institute,, National Health Research and Training Institute,, National Health Research and Training Institute,, National Health Research and Training Institute,, National Health Research and Training Institute,, National Health Research and Training Institute,, National Health Research and Training Institute,, National Health Research and Training Institute,, Copperbelt University, Lusaka Apex Medical University, University College London, Imperial College London, Imperial College London, Ghent University, Ghent University, London School of Hygiene & Tropical Medicine - Department of Clinical Research, London School of Hygiene & Tropical Medicine, London School of Hygiene & Tropical Medicine, London School of Hygiene & Tropical Medicine and London School of Hygiene & Tropical Medicine, Faculty of Infectious & Tropical Diseases, Department of Disesae Control