A hepatitis C test is the blood test that is used for the diagnosis of hepatitis infection in your body or to analyze the treatment against the virus. In HCV-RNA test the genetic material aka RNA of the virus is detected in the blood. It is used for detecting or confirming the hepatitis infection. Another way is to test the antibodies present in your blood. The test will detect the antibodies in the blood and reports whether you had the infection in past or in recent times. This test is always followed by the HCV-RNA qualitative test for confirmation of the infection and further treatment.