1. Children’s Infectious Diseases Clinical Research Unit (KID‐CRU), Stellenbosch University and Tygerberg Children’s Hospital, Cape Town, South Africa
2. Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg and Chris Hani Baragwanath Hospital, Soweto, South Africa
3. Anova Health Institute, Paarl, Western Cape, South Africa
4. Red Cross War Memorial Children’s Hospital and the University of Cape Town, Cape Town, South Africa