The purpose of this study is to compare the efficacy and safety of BEM/RZR to SOF/VEL in adults with chronic HCV.

Key Inclusion Criteria:

• Use of adequate contraception for females of childbearing potential

• Must be direct-acting antiviral (DAA)-treatment-naïve (never exposed to an approved or experimental DAA for HCV)

• Documented medical history compatible with chronic HCV

• Either no liver cirrhosis or with compensated liver cirrhosis

• If HIV-1-positive, must meet the following 2 criteria:

  1. Antiretroviral (ARV) regimen for >8 weeks prior to screening visit, with CD4 T-cell count >200 cells/mm3 and plasma HIV-1 RNA \