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Viral hepatitis in all its forms is a major public health problem throughout the world, affecting several hundreds of millions of people.Viral hepatitis is a cause of con- siderable morbidity and mortality both from acute infection and chronic sequelae which include, in the case of hepatitis B, C and D, chronic active hepatitis and cirrhosis.Hep- atocellular carcinoma, which is one of the 10 commonest cancers worldwide, is closely associated with hepatitis B and, at least in some regions of the world, with hepatitis C