In South Africa, young women and girls are exposed to extremely high levels of gender-based violence (GBV) and HIV infection. Given the links between the two epidemics, it is important that HIV prevention programmes also address violence against women and children. The Global Fund’s Young Women and Girls (YWG) programme is a multi-pronged HIV prevention programme targeting young women and girls and was implemented in 10 districts in South Africa from April 2016 to March 2019. This briefing paper reports on the lessons learnt from a process evaluation of the child protection component of the programme