About the Authors

Ziyaad Dangor

Affiliations Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa, Department of Science and Technology/National Research Foundation: Vaccine Preventable Diseases, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa, Department of Paediatrics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Sanjay G. Lala

Affiliation Department of Paediatrics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Clare L. Cutland

Affiliations Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa, Department of Science and Technology/National Research Foundation: Vaccine Preventable Diseases, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Anthonet Koen

Affiliations Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa, Department of Science and Technology/National Research Foundation: Vaccine Preventable Diseases, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Lisa Jose

Affiliations Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa, Department of Science and Technology/National Research Foundation: Vaccine Preventable Diseases, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Firdose Nakwa

Affiliation Department of Paediatrics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Tanusha Ramdin

Affiliation Department of Paediatrics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Joy Fredericks

Affiliation Department of Paediatrics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Jeannette Wadula

Affiliation Department of Clinical Microbiology and Infectious Diseases, National Health Laboratory Service, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Shabir A. Madhi

shabirm@nicd.ac.za

Affiliations Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa, Department of Science and Technology/National Research Foundation: Vaccine Preventable Diseases, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa, National Institute for Communicable Diseases: a division of National Health Laboratory Service, Centre for Vaccines and Immunology, Sandringham, Gauteng, South Africa

Competing Interests

The authors have declared that no competing interests exist

Author Contributions

Conceived and designed the experiments: ZD SGL SAM CLC. Performed the experiments: ZD AK LJ FN TR JF JW. Analyzed the data: ZD SGL SAM. Wrote the paper: ZD SGL SAM.