1. Medical Research Council, Respiratory and Meningeal Pathogens Research Unit, Faculty of Health Sciences
2. Department of Science and Technology/National Research Foundation, Vaccine Preventable Diseases, University of the Witwatersrand, Johannesburg, South Africa
3. Centers for Disease Control and Prevention, Atlanta, Georgia
4. Red Cross War Memorial Children’s Hospital, University of Cape Town
5. Tygerberg Hospital, University of Stellenbosch, Cape Town
6. East London Hospital Complex, Walter Sisulu University
7. Steve Biko Academic Hospital/Kalafong Hospital, University of Pretoria
8. Universitas Hospital, University of the Free State, Bloemfontein
9. Chris Hani Baragwanath Academic Hospital/Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg
10. Inkosi Albert Luthuli Hospital, University of Kwa-Zulu Natal, Durban, South Africa
11. Statistics, Modelling and Economics Department, Public Health England, London, United Kingdom