the rna shows your viral count but this does not mean much. the big test is the biopsy. the bx stage shows if you need to tx soon or can wait years.
1)to determine your viral load for hep C
2)To diagnose an infection with hepatitis A or to evaluate the need for or response to the hepatitis A vaccine
3)To determine your prothrombin time, (blood clotting time) which is determined by proteins made in your liver. INR is the international ratio that makes the test standardized so the results remain the same no matter what is used to determine the clotting factor.
Hope this is understandable
Bug
the pcr quant test will tell you the viral load