Women face a greater risk of HIV infection worldwide than men. This study explored socio-economic, cultural and environmental factors influencing young women’s vulnerability to HIV. A quantitative explorative study was conducted among young women in Sunnyside, Pretoria. A sample of 158 young women in the age group 18 to 24 years from all language groups was randomly selected to participate in this study. The findings showed that poverty, peer pressure and multiple sexual partners were the main factors that influenced young women in Sunnyside’s vulnerability to HIV. Behavioural change and social change were recommended as long-term processes, which need to be taken into consideration. Findings from the Sexual Relationship Power Scales show that young women between 18 and 21 years experience physical abuse, emotional abuse, sexual abuse and forced sex in their relationships. The study concluded with specific recommendations for the successful implementation of policy makers and planners to protect women. / Health Studies / M.A. (Social Behaviour Studies in HIV/AIDS)