1. Centre for Vaccines and Immunology, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg
2. Department of Paediatric Neurology, Neuroscience Institute, Red Cross War Memorial Children’s Hospital, University of Cape Town, South Africa
3. Paediatric Infectious Diseases Unit, Red Cross War Memorial Children’s Hospital, University of Cape Town, South Africa
4. Department of Paediatrics and Child Health, University of Cape Town, South Africa
5. Department of Paediatrics and Adolescent Medicine, University of Hong Kong, China
6. Division of Public Health, Surveillance and Response, Department of Health, Provincial Government of the Western Cape, Cape Town
7. Department of City Health, Social Services Directorate, Cape Town
8. Public Health Surveillance and Response Division, Johannesburg
9. Outbreak Response Unit, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg
10. Child, Youth and School Health, National Department of Health, Pretoria, South Africa
11. World Health Organization (WHO) Country Office, Pretoria, South Africa
12. WHO Regional Office for Africa, Brazzaville, Republic of Congo
13. Polio Department, WHO Strategic Initiatives Cluster, Geneva, Switzerland
14. Chemical Pathology, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa