A randomized, double-blind, placebo-controlled, multicenter and Phase IIa clinical trial for the effectiveness and safety of Baicalein Tablets in the treatment of Improve other aspects of healthy adult with influenza fever

INTERVENTION: low‐dose group:4 Baicalein Tablets and 2 placebo per time, three times a day;high‐dose group:6 Baicalein Tablets per time, three times a day;placebo group:6 placebo per time, three times a day; CONDITION: influenza PRIMARY OUTCOME: The time of fever relieving; SECONDARY OUTCOME: symptom alleviating time of influenza;Percentage of subjects with influenza complications;Percentage of antipyretic drugs used;Percentage of virus positive to negative; INCLUSION CRITERIA: 1. Meet the diagnostic criteria for influenza (non‐severe); 2. Fever to take medicine for the first time, The patient's maximum temperature (axillary temperature) is over 38?; 3. The rapid virus antigen test of nasal swab was positive; 4. Course of disease = 24 hours(The definition of course of disease is the time from fever to take investigational product for the first time); 5. Aged 18 to 65 years old male and female; 6. Sign the informed consent form.