Low-dose IL-2 to the Kinetics of Regulatory T-cell in Healthy Volunteers

Inclusion Criteria: * Without any chronic diseases diagnosed (including allergies); * Effective contraception\> 2 weeks before the first administration of the experimental drug or its placebo and β-hCG negative at the verification of the selection criteria; * Affiliated to a social security system; * Free, informed and written consent, signed by the subject and the investigator, before any action required by the research. * Not taking any treatment Exclusion Criteria: * Subject in a period of exclusion of participation in other biomedical research; * Participation in another research ≤ 1 month and during the study except for research Transimmunom (Non-interventional research involving the human person); * known antecedents of autoimmune diseases; * Hypersensitivity to any of the excipients of the investigational drug (mannitol, sodium laurilsulfate, monosodium phosphate dihydrate, disodium phosphate dihydrate); * Evolutionary infection requiring treatment; * Viral infection and benign infection less than 2 months old; * Venous capital not allowing blood samples; * Pregnant or lactating women; * Men and women of childbearing potential without effective contraception during the study; * Live attenuated virus vaccination in the month prior to inclusion or during the study; * Surgical intervention ≤ 2 months or planned during the study; * Psychiatric pathology or drug addiction that may impair ability to comply with protocol requirements or give informed consent; * Presence or history of cancer that has not been cured for less than 5 years, except in situ cervical cancer, or basocellular cancer; * Subject under a legal protection measure.