 The PARCOURS study was conducted to study how health trajectories and social and migratory paths are interlaced for migrants from sub-Saharan Africa living in France. This retrospective quantitative life-event survey was conducted from February 2012 to May 2013 in health-care facilities in the greater Paris metropolitan area Ile-de-France, among three groups of migrants born in sub-Saharan Africa: one group receiving HIV care, one group with chronic hepatitis B, and a third group of people visiting primary-care centres. Recruitment took place at facilities randomly selected from an exhaustive list of HIV outpatient hospital clinics n24, hepatitis treatment clinics n20 and general practice medical centres n30. 