National Health Laboratory Services (NHLS) - National Institute for Communicable Diseases, National Health Laboratory Services (NHLS) - Centre for Respiratory Diseases and Meningitis, Government of the United States of America - Division of Influenza, Division of Public Health Surveillance and Response, National Institute for Communicable Disease of the National Health Laboratory Service, South Africa Medical Research Council (SAMRC) Centre for Health Economics and Decision Science- PRICELESS SA, School of Public Health, University of the Witwatersrand, National Health Laboratory Services (NHLS) - National Institute for Communicable Diseases, Government of the United States of America - Centers for Disease Control and Prevention (CDC), National Health Laboratory Services (NHLS) - National Institute for Communicable Diseases, National Health Laboratory Services (NHLS) - Centre for Respiratory Diseases and Meningitis, Western Cape Government: Health, Health Impact Assessment Directorate, University of Cape Town (UCT), Stellenbosch University - Division of Infectious Diseases, Mitchells Plain District Hospital, Khayelitsha District Hospital, Western Cape Department of Health, National Health Laboratory Services (NHLS) - National Institute for Communicable Diseases, Department of Medicine, Charlotte Maxeke Johannesburg Academic Hospital and the University of the Witwatersrand, Walter Sisulu University - Department of Medicine, Department of Medicine, Klerksdorp-Tshepong Hospital and the University of Witwatersrand, Stellenbosch University - Department of Medicine, Free State Department of Health, Pietermaritzburg Metropolitan Hospital - Department of Medicine, Limpopo Department of Health, Northern Cape Department of Health, Gauteng Department of Health, Mpumalanga Department of Health, KwaZulu-Natal Department of Health, Eastern Cape Department of Health, affiliation not provided to SSRN and National Health Laboratory Services (NHLS) - National Institute for Communicable Diseases

Western Cape Government - Health Intelligence, University of Cape Town (UCT) - Division of Chemical Pathology, Western Cape Government - Health Intelligence, Western Cape Government - Health Intelligence, University of Cape Town (UCT) - School of Public Health, National Health Laboratory Services (NHLS), National Health Laboratory Services (NHLS), National Health Laboratory Services (NHLS), Western Cape Government - Health Intelligence, Western Cape Government: Health, Health Impact Assessment Directorate, Western Cape Government - Health Intelligence, National Health Laboratory Services (NHLS), Stellenbosch University - Division of Medical Virology, National Health Laboratory Services (NHLS), National Health Laboratory Services (NHLS), Western Cape Government - Metro Health Services, Western Cape Government - Health Intelligence, University of Cape Town (UCT) - School of Public Health, Western Cape Government - Rural Health Services, Johns Hopkins University - Department of Medicine, Division of Medical Virology, University of Cape Town (UCT) - Wellcome Centre for Infectious Disease Research in Africa, Institute of Infectious Disease and Molecular Medicine, Western Cape Government - Health Intelligence and National Health Laboratory Services (NHLS)