- Failure on a previous treatment. Failure is defined as the persistence of detectable HCV RNA. The previous HCV failure treatment profile must be able to be documented according to the following terminology:- Relapsing patient: HCV RNA undetectable at the end of treatment, becoming detectable again after the discontinuation of treatment- Breakthrough: increase of viremia of 1 log or more during the treatment - Non-responding patient with partial response: HCV RNA detectable at W24 without ever having been undetectable and with a decrease in HCV RNA ≥ 2 log at W12 - Non-responding patient with nul response: decrease in HCV RNA < 2 log at W12