Infection with hepatitis C virus is a serious worldwide problem which may lead to cirrhosis and hepatocellular carcinoma. The prevalence of HCV in Egypt is very high (about 20 % of the population). The only available treatment for HCV is the alpha interferon in combination with the guanosine analogue ribavirin. The immune response to this virus is insufficient in most infected individuals, thus the majority of whom develop chronic liver disease with viral persistence despite the presence of HCV-antibodies and cellular immune responses. Differences in the host cellular immune response to HCV...