Study of the Impact of Time of Vaccination on Response to Influenza Vaccine in Patients With Chronic Renal Failure

Who May Qualify: - Chronic renal failure patient at stage 4 or 5 (i.e. estimated GFR \< 30mL/min/1.73m2); or Dialysis patient; or renal transplant patient regardless of GFR; - Age ≥ 18 years; - Indication for influenza vaccination; - Express free and willing to sign a consent form. Who Should NOT Join This Trial: - Known hypersensitivity to influenza vaccine or egg proteins; - Previous influenza vaccination for the current season; - Current infection; - Current acute illness; - Treatments with a major impact on vaccine response: - Treatment of rejection within the previous 3 months; - Renal transplantation with induction performed within the previous 6 months; - Immunosuppressive treatment including CTLA4 agonist, complement inhibitor, anti-CD20; - Treatments that may distort the serological response: Polyvalent immunoglobulin infusion within the preceding 3 months; - Vulnerable persons (minors, adults under guardianship or trusteeship, persons deprived of their liberty, persons unable to speak French); - Subjects not affiliated to Social Security. Always talk to your doctor about whether this trial is right for you.