For almost two decades Margaret's work has centred around infectious diseases, preventing their transmission and identifying the impact of these infections in vulnerable populations. A researcher and clinician, her principal research interests are in the epidemiology of blood-borne viruses (BBVs) HIV, hepatitis B and hepatitis C, sexually transmitted infections, and improving the management of individuals who already have the infection. Margaret has considerable experience in undertaking community-based research involving young people, injecting drug users (IDUs) and vulnerable populations, and experience in research in tertiary care institutes. She also has considerable experience in undertaking research that used new technologies (such as SMS, Facebook) for health promotion and prevention interventions.