- Subjects must have received Lambda in a previous trial and have Hepatitis C virus (HCV) Ribonucleic acid (RNA) < LOQ at the completion of the required post-treatment follow-up (must enter this study within 6 months of completion of the required post-treatment follow-up in the previous trial) NOTE: For blinded parent trials, subjects who have HCV RNA <LOQ at the completion of the required post-treatment follow-up may enter this study without knowledge of their treatment assignment in the parent study. Subjects who received control agents (eg, pegylated-interferon alfa) in the previous protocol will be allowed to participate until unblinded treatment information is released; at that time subjects will have the option to continue in the study