Influenza, or influenza, is an acute respiratory infectious disease caused by influenza virus infection, which can be contracted through droplet transmission, contact transmission, aerosol transmission and other means. Influenza is generally seasonal, divided into influenza A and influenza B. The main infectious agents of influenza are patients and latently infected persons. The virus can be continuously detoxified in the respiratory secretions of patients and latently infected persons for 3-7 days, and for more than 1 week if the virus is present in immunocompromised, critically ill patients or children. Influenza viruses are mainly spread by droplet transmission, such as sneezing and coughing, which can cause influenza transmission. Influenza virus can also be transmitted directly through mucous membrane sites such as the mouth, nose and eyes, or indirectly by contact with items contaminated with the virus. Influenza viruses can also be spread through aerosols in certain places, such as poorly ventilated or crowded places. The current population is generally susceptible to influenza. After diagnosis of influenza, nutrition and rest should be strengthened. Symptomatic treatment, such as physical cooling, relieving cough and phlegm, etc., can be given as prescribed by the doctor, and antiviral treatment should be given if necessary.