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Richard Hayes and Helen Weiss have been involved in research on the epidemiology and control of HIV for over 20 years. In this talk, they will briefly outline the magnitude and diversity of the global epidemic of HIV, and current approaches to prevention including treatment as prevention.  The session will conclude with a question & answer session with the audience.

Richard Hayes is a Professor of Epidemiology and previous Head of the MRC Tropical Epidemiology Group.  Richard has been working at the School since 1978, collaborating on research on HIV and related infections in sub-Saharan Africa.  He helped establish and is one of the principal investigators of the long-term collaborative programme of research in Mwanza, Tanzania (MITU).  He is also the Principal Investigator of the HPTN 071/PopART trial, measuring the impact of universal voluntary HIV testing and immediate treatment on population-level HIV incidence in Zambia and South Africa. 

Helen Weiss is a Professor of Epidemiology and Director of the MRC Tropical Epidemiology Group.  Helen has collaborated on a wide range of projects mainly on HIV and mental health in sub-Saharan Africa and India.  Her work focuses on conditions of major public health importance in low and middle-income countries, particularly on HIV, mental health and adolescent health.