A Phase 1, Open-Label, Parallel-Group, Single-Dose Study to Evaluate the Safety and Pharmacokinetics of Bemnifosbuvir and Ruzasvir Administered as a Fixed-Dose Combination in Adult Participants With Severe Renal or Hepatic Impairment in Comparison to Healthy Participants

Inclusion Criteria: * Must agree to use two methods of birth control from Screening through 90 days after administration of the last dose of study drug * Females must have a negative pregnancy test at Screening and prior to dosing * BMI of 18.5 to 43.0 kg/m2 * Willing to comply with the study requirements and to provide written informed consent Renal Impaired Subjects (Group 1): * Considered stable in the judgement of an Investigator * Presence of severe renal impairment or kidney failure (as defined by eGFR\< 30 mL/ min) Hepatic Impaired Subjects (Group 2): * Considered stable for at lea…