People with influenza A usually take about 1 to 2 weeks to return to normal, but if complications arise, the healing time can be extended. Influenza A is a type of influenza, which is mainly caused by human infection with influenza virus A. The most serious one is H1N1 influenza. According to epidemiological clinical data show that the incubation period of influenza A is generally 1-7 days, the vast majority of people with symptoms are generally mild, can show fever, cough, runny nose, sore throat and other symptoms, and its signs mainly include pharyngeal congestion and enlarged tonsils. Most people with influenza A will recover in 1-2 weeks. Some patients, especially the elderly and frail or those with chronic diseases of the heart and lungs, are prone to complications such as pneumonia when influenza A occurs, and the recovery time will be prolonged, or even life-threatening due to complications. Once infected with influenza A, it is necessary to strengthen nutrition and rest, drink more water, and follow the doctor’s instructions for antiviral and symptomatic treatments such as reducing fever and relieving cough, which can help promote recovery.