Didier Koumavi Ekouevi Didier Koumavi Ekouevi is a medical epidemiologist working on HIV infection and its prevention in sub-Saharan Africa within the Public Health Departement at the University of Lomé, in Togo. He is the Head of Public Health department and Director of Centre de formation et de Recherche en Santé Publique. He is also senior researcher at the INSERM U1219 research center in the University of Bordeaux. Prof. Ekouevi has 25 years of experience in research on HIV epidemiology and global health. His scientific interest is on the public health challenges of HIV prevention and care especially prognosis of antiretroviral-treated adults and children, HIV infection in key population in West Africa. His scientific productivity can be described through more than 225 publications in peer-reviewed journals.