Influenza, also known as influenza, the most contagious period is within three days of the onset of the disease, is caused by the influenza virus is a group of acute infectious diseases, mainly by the droplets through the respiratory tract transmission to make people sick. Influenza is characterized by a short incubation period, highly infectious, fast spreading, so in a very short period of time can break out epidemics. The antigen of influenza is prone to mutation, which can lead to repeated epidemics of influenza, and the clinical manifestations are mainly high fever, fatigue, headache, and muscle pain and other symptoms of poisoning. Respiratory symptoms may be mild, but the elderly and chronically ill need to be alerted to the possibility of serious complications leading to disease progression. There are two main classes of drugs for the treatment of influenza virus, mainly amantadine and oseltamivir, which are used as the first choice in antiviral therapy.