1. National Institute for Communicable Diseases of the National Health Laboratory Service; Centre for Respiratory Diseases and Meningitis; Johannesburg South Africa
2. University of the Witwatersrand; School of Pathology, Faculty of Health Sciences; Johannesburg South Africa
3. Technical Research and Development, Novartis Pharma AG; Basel Switzerland
4. Centers for Disease Control and Prevention; Influenza Division; Atlanta Georgia USA
5. Centers for Disease Control and Prevention; Influenza Program; Pretoria South Africa
6. Klerksdorp-Tshepong Hospital Complex; Department of Medicine; Klerksdorp South Africa
7. University of the Witwatersrand; Perinatal HIV Research Unit; Johannesburg South Africa
8. Pietermaritzburg Metropolitan Hospital; Department of Medicine; Pietermaritzburg South Africa
9. University of KwaZulu-Natal; Department of Medicine; Pietermaritzburg South Africa
10. University of the Witwatersrand; School of Public Health, Faculty of Health Sciences; Johannesburg South Africa
11. University of the Witwatersrand; Medical Research Council, Respiratory and Meningeal Pathogens Research Unit; Johannesburg South Africa
12. University of the Witwatersrand; Department of Science and Technology/National Research Foundation: Vaccine Preventable Diseases; Johannesburg South Africa
13. University of Pretoria; Emerging Arbo And Respiratory Virus Program, Centre for Viral Zoonoses, Department of Medical Virology; Pretoria South Africa