The acute inflammation of liver in patients (acute hepatitis) can be produced by different chemicals (such as alcohol, drugs) and different viruses (such as A, B, C, D, E, F, G). The hepatitis C virus (HCV) was discovered in 1989, which is dominantly transmitted via of blood transfusion or of intravenous medicine. The etiological role of HCV has gradually increased in Hungary and in the World, which produces acute (hepatitis) and chronic (hepatitis, liver cirrhosis, hepatocellualr carcinoma) liver diseases.