A Study to Evaluate the Safety, Pharmacokinetics and Efficacy of the Combination of AL-335, Odalasvir, and Simeprevir

Inclusion Criteria

• Participant has provided written consent
• In the Investigator's opinion, the participant is able to understand and comply with protocol requirements, instructions, and protocol stated restrictions and is likely to complete the study as planned
• Male or female, 18-70 years of age
• Body mass index (BMI) 18-35 kilogram per meter square (kg/m^2), inclusive
• A woman of childbearing potential must have a negative serum (beta-human chorionic gonadotropin) pregnancy test at screening
• Female participants must either:
• not be of childbearing potential defined as: i. Postmenopausal for at least 12 months (that is [i.e.], 2 years of amenorrhea without an alternative medical cause) and a serum follicle stimulating hormone (FSH) level in the postmenopausal range (per reference laboratory), OR ii. Surgically sterile (example [e.g.], underwent total hysterectomy, bilateral oophorectomy, or bilateral tubal ligation/bilateral tubal clips without reversal operation), or otherwise incapable of becoming pregnant, OR
• be of childbearing potential AND
• not heterosexually active (e.g., abstinent or homosexual) from screening until 6 months after study drug administration (or longer, if dictated by local regulations), OR
• if heterosexually active
• have a vasectomized partner (confirmed sterile per verbal account of the participant), OR
• using an acceptable method of birth control from screening and agree to continue to use the same method of contraception throughout the study and for 6 months after study drug administration (or longer, if dictated by local regulations). Oral hormone based contraceptives are not allowed from 14 days before the planned study drug administration until 6 months after the last dose of treatment due to the potential for drug-drug interactions which might undermine their efficacy. An intrauterine device (IUD), being either hormonal (i.e., Intra-Uterine System [IUS*]) or non-hormonal, is considered highly effective and reliable; therefore participants using an IUD/IUS are not required to use additional contraceptive methods (no double-barrier method is required). Other non-oral hormone-based contraception methods (e.g., injectable, implants, transdermal system, vaginal ring) may be continued, but as the interaction of the study drug with hormone-based contraception is unknown, these methods are not considered to be reliable and therefore participants should use a double-barrier method (e.g., male condom+either diaphragm or cervical cap with or without spermicide).
• An IUS does not rely on systemic plasma concentrations and is therefore not expected to be impacted by a potential drug-drug interaction (DDI)

Note 1: Sexual abstinence is considered a highly effective method only if defined as refraining from heterosexual intercourse during the entire period of risk associated with the study drug. The reliability of sexual abstinence needs to be evaluated in relation to the duration of the study and the preferred and usual lifestyle of the participant.

Note 2: A male and female condom should not be used together due to risk of breakage or damage caused by latex friction

• A post-menopausal female who is receiving hormone replacement therapy and is willing to discontinue hormone therapy 30 days before study drug dosing and agrees to remain off hormone replacement therapy for the duration of the study may be eligible for study participation.
• Male participants must either:
• be surgically sterile (had a vasectomy), or otherwise incapable of fathering a child, OR
• not be heterosexually active (e.g., abstinent or homosexual) from enrollment (Day 1) in the study until at least 6 months after study drug administration, OR
• if heterosexually active:
• have a partner who is postmenopausal (2 years amenorrhea), surgically sterile (e.g., has had a total hysterectomy, bilateral oophorectomy, or bilateral tubal ligation/bilateral tubal clips without reversal operation), or otherwise incapab