The increasing morbidity and mortality for liver diseases and particularly for hepatocellular carcinoma (HCC) widely started worldwide screening programs and healthcare strategies targeting on the early diagnosis and care of chronic viral hepatitis. This PhD thesis focused on care of patients with chronic hepatitis C by the study of the epidemiologic, clinical and experimental profile: a) to identify patients with the higher risk of liver damage and clinical evolution and b) to applied the most effective antiviral therapy schedule consisting of Peg-IFN and ribavirin, the only applicable chance for allowing viral eradication and avoiding progressive liver damage and related-complications. Therefore the research consists in 4 studies tha...