Biomedical Research & Training Institute - The Health Research Unit Zimbabwe, London School of Hygiene & Tropical Medicine - Faculty of Infectious and Tropical Diseases, Biomedical Research & Training Institute - The Health Research Unit Zimbabwe, University College London, Instituto Nacional de Saude, Mbeya Medical Research Center, Biomedical Research and Training Institute, Soutien Pneumologique International, University College London, University College London, Bulawayo City Health, East, Central, and Southern Africa-Health Community, University of Tübingen - Institute of Tropical Medicine, Instituto Nacional de Saúde., National Institute for Medical Research (NIMR), Biomedical Research and Training Institute, Ludwig Maximilian University of Munich (LMU), Ludwig Maximilian University of Munich (LMU) - Division of Infectious Diseases and Tropical Medicine and London School of Hygiene & Tropical Medicine - Department of Clinical Research