The study investigates the influence of online and social media in HIV prevention, with a focus on young women and HIV risk perception related to age-disparate relationships. The study was conducted using an existing online prevention HIV prevention platform by means of a self-administered online questionnaire. Convenience sampling was used to recruit between 250 and 500 users between the ages of 18 to 24 years. The results revealed poor HIV risk perception in 46% of respondents, which seemed influenced by their perception (38%) that older men are safer sexual partners than younger men. In addition, this poor risk perception is seemingly influenced by the fact that many young women (77%) involved in these relationships, viewed these as primarily based on love and affection and as being “safe”, challenging the commonly held perception that these are primarily transactional in nature. Further respondents reported at rates of between 38% and 44% that the platform had improved their HIV risk perception related to these relationships. In summary, the research resulted in several recommendations to improve the platform, including improving ways of getting more and on-going feedback from users on their HIV risk perceptions and designing content and engagement strategies to address these. / Sociology / M. A. (Social Behaviour Studies in (HIV/AIDS)