Affiliations
1Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America.
2Influenza Program, Centers for Disease Control and Prevention, Pretoria, South Africa.
3Centre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
4MassGenics, Duluth, Georgia, Unites States of America.
5School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
6Global Immunization Monitoring and Surveillance Team, Expanded Programme on Immunization, Department of Immunization, Vaccines and Biological, World Health Organization, Geneva, Switzerland.
7Division of Virology, National Health Laboratory Service, Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa
8School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
9Department of Medicine, Pietermaritzburg Metropolitan Hospital, Pietermaritzburg, South Africa.
10Department of Medicine, University of KwaZulu-Natal, Pietermaritzburg, South Africa.
11Department of Medicine, Klerksdorp-Tshepong Hospital Complex, Klerksdorp, South Africa.
12Department of Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
13Perinatal HIV Research Unit, University of the Witwatersrand, Johannesburg, South Africa.