A Study to Compare the Oral Bioavailability of Single Doses of Two Vapendavir Drug Formulations in Healthy Volunteers

Inclusion Criteria: * Must be male or female between 18 and 55 years of age (inclusive) with BMI between 18 and 30 kg/m2 (inclusive), and weight ≥50 kg at the time of screening * Capable of giving written informed consent * Subject is able to understand and comply with the protocol requirements, instructions and restrictions * Healthy on the basis of physical examination, medical history, medication usage, VS, ECGs, and clinical laboratory tests * Female subjects must be of non-childbearing potential * Male subjects must agree to use a double barrier method of birth control Exclusion Criteria: * Positive results for Hepatitis B, Hepatitis C, or HIV * Frequent use of tobacco products, including cigarettes, cigars, chewing tobacco * A medical history of significant hematological, gastrointestinal, respiratory, renal, hepatic, cerebrovascular, immunologic, psychiatric or cardiovascular disease or event; Current or recent respiratory infection * Presence or history of significant allergy * Clinically significant abnormalities noted on ECG * Screening vital signs representing sustained elevated blood pressure * Presence of significant gastrointestinal abnormalities * Safety laboratory abnormalities noted at screening which are clinically significant * Current or defined history of abuse of alcohol or illicit drugs * A positive pregnancy test at screening * Poor vein access or fear of venipuncture or sight of blood