1. Paediatric Neurology Division Department of Paediatrics and Child Health Neuroscience Institute Red Cross War Memorial Children's Hospital University of Cape Town Cape Town South Africa
2. Paediatric Infectious Diseases Unit Department of Paediatrics and Child Health Faculty of Health Sciences Red Cross War Memorial Children's Hospital University of Cape Town Cape Town South Africa
3. Division of Medical Virology Department of Clinical Laboratory Sciences Faculty of Health Sciences University of Cape Town Cape Town South Africa
4. National Health Laboratory Service Cape Town South Africa