Etienne Karita is the Country Director of Project San Fancisco (PSF), a clinical research organisation established in Kigali, Rwanda since 1986. Together with its sister organisation, the Zambia Emory HIV research Project (ZEHRP), it forms the Rwanda Zambia HIV Research Group (RZHRG), headquartered at Emory University. Research studies conducted at RZHRG have focused on the natural history and predictors of incidence of HIV, with a particular emphasis on the population of HIV discordant couples to investigate the behavioural, clinical, virologic, immunologic, and immunogenetic correlates of heterosexual transmission of HIV. With support from the International AIDS Vaccine Initiative (IAVI), RZHRG is conducting clinical trials to evaluate the safety and immunogenicity of different candidate HIV vaccines. RZHRG is also working in close collaboration with the Ministries of Health in Rwanda and Zambia to prevent HIV transmission in high-risk populations, including female sex workers (FSW) and men who have sex with men (MSM). Prior to joining PSF, Karita was a Senior Technical Advisor and International Programme Officer for PMTCT programmes sponsored by the Elizabeth Glaser Paediatric AIDS Foundation. He has also served as the Director of the Treatment and Research AIDS Centre, the National Reference Laboratory, as well as the National AIDS Control Programme in Rwanda.