Inclusion Criteria:  Criteria relating to the population studied: patients aged 18 to 65 years old, men or women, regardless of ethnic origin. Nosological criteria: HIV-1 infection, documented by a complete western blot and/or a detectable viral load at the time of diagnosis, regardless of the viral subtype. Pathology severity and progression criteria: patients with a CD4+ count greater than 500 elements/mm3 at the last follow-up visit prior to inclusion in the study. Undetectable viral load for at least six months on stable treatment. Criteria relating to treatments/strategies/procedures: Current cART treatment mandatory, regardless of the combination of anti-retrovirals, effective with undetectable viral load. The number of processing lines is not limited. Criteria relating to regulation: Absence of opposition  Exclusion Criteria:  Criteria relating to the population studied: pregnant or breastfeeding women Criteria relating to contraindications to the protocol explorations:  Acute or chronic anaemias Acute infections, fever Coagulation disorders, patients taking anticoagulants  - Criteria relating to regulation: Subjects placed under judicial safeguard, guardianship or curatorship Subjects participating in another research with an ongoing exclusion period.