This research aims to study how effective and safe Xuanfei Baidu Granule is for treating Influenza A, a type of flu caused by a virus. A total of 584 people will join the study and be divided into four groups. Each group will receive a different treatment, including the Xuanfei Baidu Granule alone, a placebo (a sugar pill that looks like the medicine but has no effect), or a combination of Xuanfei Baidu Granule and Baloxavir Marboxil tablet. Participants will take the granule with hot water twice a day for five days and the tablet once for one day. Doctors will check in daily for a week to see how they are doing.
- Participants must be between 18 and 65 years old and have a positive test for Influenza A.
- Individuals with severe health conditions, allergies to the medicine, or recent vaccines cannot participate.
- Daily check-ins are required for seven days after starting the study.