The Dataids cohort is a prospective observational cohort of 30,000+ patients followed in 15+ HIV centers scattered throughout France. The Dataids cohort is an ongoing collaboration and patients have been enrolled into the study since 2010; the data are collected from the clinics as part of routine care. Included patients should be patients who had a scheduled visit in the outpatient clinic regardless of CD4 cell count, HIV viral load or ART status. For all HIV patients enrolled and under follow up, demographic data, immunological and virological data, serological evidence for infection with hepatitis B virus (HBV), hepatitis C virus (HCV), or syphilis, laboratory, therapeutic and clinical data are collected annually.