Patient description: A 53-year-old man presents with chronic HCV infection for the past 2 years. His past medical history is only significant for inguinal hernia surgery when he was 20 years old. He is on IFN (100 mg/week) plus RBV (400 mg/day) combination therapy for the past 9 months. Direct antiviral drugs were added to his treatment 6 months ago. His medical record shows previous positive HCV RNA tests as well as positive enzyme immunoassay for anti-HCV-antibodies. The recent biopsy was negative for hepatocellular carcinoma and was only remarkable for chronic inflammation compatible with a chronic viral hepatitis. There is no evidence of alcoholic liver disease, bleeding from esophageal varices, hemochromatosis, autoimmune hepatitis or metabolic liver disease. He is an alert male with no acute distress. His BP: 130/75, HR: 90/min and BMI: 27. His abdomen is soft with no ascites or tenderness. The lower extremities are normal with no edema.

Clinical trial eligibility criteria: eligible ages (years): 18.0-70.0,  Chronic Hepatitis C Infection Chronically infected patients with Hepatitis C virus Genotype 1 (1a or 1b) with detectable viremia (HCV RNA in blood) for more than 6 months and naïve to treatment Patients must have compensated liver disease, with no history of ascites, jaundice, hepatic encephalopathy or bleeding from esophageal or gastric varices requiring beta-blockers No histological evidence of hepatic cirrhosis (including compensated cirrhosis) based on a liver biopsy taken within 24 months prior to baseline; or on a FibroScan® performed within 6 months prior to treatment which indicates the absence of liver cirrhosis, i.e., stage < F4 (METAVIR); in case of no available results, a liver biopsy will be performed prior to treatment All laboratory parameters must be grade 0 or 1 (as per CTCAE criteria) except for alanine amino-transferase (ALT), aspartate amino-transferase (AST), gamma glutamyl transferase (GGT) and alkaline phosphatase (ALP) for which a grade 2 will be allowed if stated non clinically significant No co-infection with Human Immunodeficiency Virus (HIV) or hepatitis B virus (HBsAg positive) No intravenous (IV) drug or alcohol abuse Serum thyroid stimulating hormone (TSH) levels within normal ranges, regardless of treatment with L-thyroxin Normal electrocardiogram (ECG) Normal retinal examination (eye fundus) within last 12 months for diabetic patients or patients suffering from high blood pressure Negative pregnancy test in women of childbearing potential (a woman who is two years post-menopausal or surgically sterile is not considered to be of childbearing potential)  Prior treatment for hepatitis C Malignancy within the last 5 years; except for patients with history of squamous cell skin cancer or basal cell skin cancer who will be enrolled, unless patients have a history of skin cancer at the vaccination site Diagnosed or suspected hepatocellular carcinoma History of psychiatric conditions including, but not limited to, psychosis, suicidal ideations, or major depression. Patients with mild to moderate depression in the past and no prior history of suicidal gestures or attempts may be enrolled if, in the Investigator's opinion, they are suitable for treatment Serious, concomitant medical disorder, including active systemic infection and proven or suspected immunosuppressive disorder History of immunodeficiency or autoimmune disease including autoimmune hepatitis, allogenic transplant, or pre-existing autoimmune or antibody-mediated disease including, but not limited to: systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, Sjogren's syndrome, or autoimmune thrombocytopenia Administration of any vaccine or immunoglobulin within 30 days before the first dose of TG4040 /SOC Significant cardiovascular disease (e.g., New York Heart Association [NYHA] class 3 congestive heart failure; myocardial infarction within the past 6 months; unstable angina; coronary angioplasty within the past 6 months; or uncontrolled arterial or ventricular cardiac arrhythmias) Systemic corticosteroid therapy or other immunosuppressive/immunomodulating drugs (e.g. Cyclosporine) within 2 months prior to first TG4040/SOC administration; corticosteroid nasal sprays, inhaled steroids for asthma and/or topical steroids are allowed Any known allergy to interferon (IFN), RBV and/or their excipients