Ulonivirine (MK-8507) in Participants With Mild or Moderate Hepatic Impairment (MK-8507-014)

Inclusion Criteria: Mild and Moderate HI (Panels A and B): * Has a diagnosis of chronic (\>6 months), stable HI with features of cirrhosis due to any etiology (stability of hepatic disease should correspond to no acute episodes of illness within the previous 2 months due to deterioration in hepatic function) Healthy Controls (Panel C): * Is in good health All Participants (Panels A to C): * Has a body mass index (BMI) ≥18.5 and ≤40 kg/m\^2, inclusive * If male, uses contraception in accordance with local regulations * If female, is not pregnant or breastfeeding and one of the following applies: 1) is not a woman of childbearing potential (WOCBP), or 2) is a WOCBP and is abstinent/uses acceptable contraception, has a negative highly sensitive pregnancy test within 24 hours of receiving study intervention, and provides medical/menstrual/recent sexual history for review by the investigator Exclusion Criteria: Mild and Moderate HI (Panels A and B): * Has a history of any illness that, in the opinion of the investigator, might confound the results of the study or poses an additional risk to the participant by their participation in the study * Is not in sufficient health * Is institutionalized/mentally or legally incapacitated * Is positive for human immunodeficiency virus (HIV)-1 or HIV-2 * Has received antiviral and/or immune modulating therapy for hepatitis B virus (HBV) or hepatitis C virus (HCV) within 90 days prior to study start * Is taking medication for a chronic…