Funded by the Centers for
Disease Control and Prevention
- Undetectable viral level, HCV: HCV RNA level that is below the lower limit of detection of a sensitive molecular assay. Previously, the lower limit of detection was typically less than 50 to 60 international units per milliliter (IU/mL). More recently, with the introduction of HCV protease inhibitors, the lower limit of detection in newer assays is 10 to 15 copies/ml.