1. Division of Infectious & Immunological Diseases and Centre for Understanding and Preventing Infections in Children, Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
2. Faculty of Medicine, Leaders in Medicine Program, University of Calgary, Alberta, Canada
3. Immunology Unit, Division of Medical Microbiology, Department of Pathology, NHLS and Stellenbosch University, Cape Town, South Africa
4. Department of Paediatrics and Child Health, Tygerberg Children's Hospital and Stellenbosch University, Cape Town, South Africa
5. Division of Medical Virology, Department of Pathology, NHLS and Stellenbosch University, Cape Town, South Africa