Mass balance study of AT-527 in Healthy Male Subjects.

This is an open-label, single-dose study assessing the absorption, metabolism, excretion, and mass balance of [14C]-AT-527 in healthy adult male subjects.

Inclusion Criteria:

• Minimum body weight of 50 kg and body mass index (BMI) of 18-32 kg/m2
• No clinically significant diseases captured in the medical history or clinically significant findings at screening physical examination.
• A non-vasectomized, male subject must agree to use a condom with spermicide or abstain from sexual intercourse during the study until 90 days after dosing. (No restrictions are required for a vasectomized male provided his vasectomy has been performed 4 months or more prior to dosing. A male who has been vasectomized less than 4 months prior to dosing must follow the same restrictions as a non-vasectomized male).
• Willing to comply with the study requirements and to provide written informed consent

Exclusion Criteria:

• Infected with hepatitis B virus, hepatitis C virus, HIV or COVID-19
• Abuse of alcohol or drugs
• Use of other investigational drugs within 28 days of dosing
• Other clinically significant medical conditions or laboratory abnormalities

Healthy, adult male, 19-55 years of age, inclusive, at the screening visit.