1. Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town , Cape Town , South Africa
2. Department of Integrative Biomedical Sciences, Faculty of Health Sciences, University of Cape Town , Cape Town , South Africa
3. Institute of Infectious Disease and Molecular Medicine, University of Cape Town , Cape Town , South Africa
4. South African Medical Research Council Vaccines and Infectious Diseases Analytics Research Unit, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
5. Department of Science and Technology/National Research Foundation, South African Research Chair Initiative in Vaccine Preventable Diseases, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
6. African Leadership in Vaccinology Expertise, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
7. Faculty of Infectious and Tropical Diseases, Department of Immunology and Infection, London School of Hygiene and Tropical Medicine , London , UK