Yanga is a social scientist with research interests in adolescent sexual health, gender and wealth inequalities (and their impact on sexual health outcomes), gender based violence, health systems surveillance of sexual risk behaviours and intimate partner violence, the role of the family unit in the development and management of adolescent risk behaviour and the use of community participation methods in intervention development. She is currently co-PI in a project tasked with developing a package of interventions to improve adolescent health and wellbeing within the Social Impact Bond (SIB) initiative.  Recently she was involved in the evaluation of a STI partner notification monitoring system in health facilities in Khayelitsha. She has also been involved in several HIV bio-behavioural surveillance studies among most-at-risk populations of women and men who have multiple sexual partners, men who-have-sex-with- men and migrant populations.