HIV-infected subjects aged between 55 and 70 years will be recruited in centres that support people who living with HIV usually. The study will be proposed consecutively to all subjects aged between 55 and 70 year. A brief inquiry will collect motives on subjects that refuse to participate. A minimum of 70 subjects by 5 years age categories will be included. Unexposed subjects will be recruited in the same regions as their HIV-infected counterparts from the CONSTANCES database, a general population health cohort, after random selection matched on age, gender, geographical origin and socioprofessional category (2 HIV-unexposed subjects for 1 exposed subject). Data collection will follow the same methods as in the CONSTANCES cohort, in particular the neurocognitive tests by trained neuropsychologists.