London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, Newcastle University, London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, London School of Hygiene & Tropical Medicine - Medical Research Council Unit: The Gambia, University of Cambridge - Department of Veterinary Medicine, University of Cambridge - Department of Veterinary Medicine, London School of Hygiene & Tropical Medicine - Medical Research Council Unit The Gambia and University of Cambridge