A Clinical Trial of KT07 Capsule in the U.S.A

Inclusion Criteria 1. Subjects with acute uncomplicated influenza with oral temperature ≥ 37.8 ℃ (100.04 °F); plus at least one respiratory symptom (nasal congestion, sore throat, cough); and at least one constitutional symptom (aches or pains, fatigue, headache, chills or sweats). If antipyretics were taken, may wait at least 4 hours after dosing to determine if a qualifying temperature is observed. 2. Subjects with RIDT confirmed influenza infection. 3. Onset of symptoms less than 48 hours before Visit 1 (Screening; study drug administration visit). The onset of symptoms is defined as either: * Time of the first increase in body temperature to ≥ 37.8 ℃ (100.04 °F); or * Time when the subject experiences at least one general or respiratory symptom. 4. Age 18 to 65 years old. 5. Subjects who are able to understand and willing to sign the informed consent form (ICF). 6. All female subjects of child-bearing potential must have a negative urine pregnancy test result. All female subjects of child-bearing potential and male subjects and their spouse/partner must agree to use a medically acceptable method of contraception (e.g., abstinence, an intrauterine device, a double barrier method such as condom + spermicide or condom + diaphragm with spermicide, a contraceptive implant, an oral contraceptive or have a vasectomized partner with confirmed azoospermia) throughout the entire study period, and for 30 days for females and 90 days for males after study drug discontinuation. Exclusion Criteria 1. Subjects with severe influenza virus infection requiring inpatient treatment. 2. Subjects with concurrent infections requiring systemic antimicrobial and/or antiviral therapy at the time of screening. 3. Subjects who have any of the following documented conditions: uncontrolled hypertension (systolic blood pressure \> 140 mm Hg or diastolic blood pressure \> 90 mm Hg), diabetes, asthma (any current or recent, not childhood if resolved), COPD (any), cardiac, hepatic, renal (including eGFR\<60) and hematopoietic disorders, bleeding tendency or hemorrhagic disease, neurological system disease, compromised immune system (including patients receiving immunosuppressant therapy, or those with cancer within the past 5 years or human immunodeficiency virus \[HIV\] infection), endocrine disorders (including thyroid disorders). 4. Subjects with anatomical nasal obstruction or gross anatomical abnormalities. For example, nasal polyps or significant nasal septal deviation. 5. Clinically obese subjects with BMI≥40. 6. Subjects with recent history (within 1 year) of alcoholism or substance abuse. 7. Received influenza vaccine within 21 days. 8. Participation in other clinical trial within 1 month, or during the study. 9. Pregnant or breast-feeding female subjects 10. Allergy or known allergy to components of study medication. 11. Subjects who took a monoamine oxidase inhibitor (MAOI) within 2 weeks prior to enrollment. 12. Previous history of difficulty swallowing capsules. 13. Any other associated disease or condition which, in the opinion of the investigator, might restrict or impede participation in the study or affect the study results.