Azithromycin is not effective for influenza A alone; if influenza A is combined with bacterial infection, azithromycin is effective. Influenza A is caused by influenza A virus infection, its clinical appearance is mainly fever, runny nose, sore throat, fatigue, limb pain and other flu-like symptoms. Influenza A virus is an RNA virus, and its therapeutic drugs include neuraminidase inhibitors such as oseltamivir and zanamivir. Azithromycin is a macrolide, and its mechanism of action is to inhibit the synthesis of bacterial proteins and play a bacteriostatic role, which can cover Mycoplasma, Chlamydia, Streptococcus pneumoniae, and Haemophilus influenzae that are common in the community, and it has no killing effect on the influenza A virus. When influenza A virus invades the human body, the body’s immunity is low, may be complicated by bacterial infection, at this time azithromycin can be applied to treat bacterial infection. Precautions: Influenza A is highly contagious, need to wear a mask, timely consultation, and follow the doctor’s instructions for treatment.