She is an HIV and infectious diseases physician and epidemiologist who has worked in the UK, United States and Sub-Saharan Africa. At WHO, she has led the development and dissemination of global normative guidance for HIV as well as Hepatitis B and C testing and treatment. She also provides technical guidance to national programs worldwide on the implementation of hepatitis B and C testing and treatment scale-up programs as part of a global elimination strategy.
Her HIV research has encompassed epidemiology, clinical trials, operational and qualitative research, and laboratory-based studies.