How much virus: This test looks for the amount of circulating hcv is in the blood. It looks specifically at the virus where as a hcv antibody test looks at the body's immune response. We check the antibody to test for prior exposure but follow the viral load (rna test) when someone is on treatment for hcv to see how the medications are affecting the virus and to test for cure.
Answered 5/31/2012
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Confirmatory test: There are individuals who test positive for hepatitis c on screening test without actual infection (false positive). Therefore, anyone who tests positive on screening test requires confirmatory test which actually detects hepatitis c rna.
Answered 1/8/2015
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