1. Centre for Respiratory Diseases and Meningitis; National Institute for Communicable Diseases of the National Health Laboratory Service; Johannesburg South Africa
2. Influenza Division; Centers for Disease Control and Prevention; Atlanta Georgia
3. Influenza Program; Centers for Disease Control and Prevention; Pretoria South Africa
4. Department of Immunization, Vaccines and Biologicals; Global Immunization Monitoring and Surveillance, Expanded Programme on Immunization; World Health Organization; Geneva Switzerland
5. Faculty of Health Sciences; School of Public Health; University of the Witwatersrand; Johannesburg South Africa
6. Department of Molecular Pathology; Lancet Laboratories; Johannesburg South Africa
7. PathCare Laboratories; PathCare Park; Cape Town South Africa
8. Division of Public Health Surveillance and Response; National Institute of Communicable Diseases; Johannesburg South Africa
9. Department of Medical Virology; Emerging Arbo-and Respiratory Virus Program; University of Pretoria; Pretoria South Africa
10. Tshwane Academic Division; National Health Laboratory Service; Pretoria South Africa