University of the Witwatersrand - Perinatal HIV Research Unit, Johns Hopkins University - Bloomberg School of Public Health, University of the Witwatersrand - Reproductive Health and HIV Research Unit (RHRU), Vanderbilt University - Division of Infectious Diseases, Stellenbosch University, Gates Foundation, University of the Witwatersrand - Reproductive Health and HIV Research Unit (RHRU), affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Cape Town (UCT) - Division of Chemical Pathology, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of the Witwatersrand - Perinatal HIV Research Unit and affiliation not provided to SSRN

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)