The incubation period of influenza is not significantly contagious, and influenza patients are contagious 1-7 days after the onset of the disease, with the strongest contagion in the first 2-3 days of the disease. Influenza virus is prone to mutation, highly contagious, and the population is generally susceptible, and the incidence is high, which has caused many outbreaks and epidemics throughout the world and is an important public health issue of global concern. Influenza is common in China in winter and spring, with clinical manifestations of high fever, malaise, headache, cough, generalized muscle aches and other symptoms of systemic toxicity, and mild respiratory symptoms. Influenza is an acute respiratory infection caused by the influenza virus, which can be spread by droplets and contact, and can usually be cured in 3-14 days, but severe patients can also be life-threatening, and the full name of influenza is influenza.