1 Vaccines and Immunity Theme, MRC Unit The Gambia at the London School of Hygiene & Tropical Medicine, Fajara, The Gambia.
2 Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK.
3 Global Program in Pediatric Respiratory Sciences, Eudowood Division of Pediatric Respiratory Sciences, Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, MD, USA.
4 Charité Centre for Global Health, Institute of International Health, Berlin, Germany.
5 TB Centre, London School of Hygiene & Tropical Medicine, London, UK.