The full name of influenza is influenza, which usually does not develop immediately after the human body is infected with influenza virus, and the incubation period is 1-3 days. Influenza occurs because the body is infected with influenza virus, which is an acute respiratory infectious disease, and the main symptoms are fever, general aches and pains, cough, and weakness. The reason why patients do not develop the disease immediately after infection with the virus is that the virus multiplies and damages the cells and tissues of the body when the damage reaches a certain level before the body becomes uncomfortable, and that period usually takes 1-3 days. Therefore, patients should pay more attention to prevention and control during the flu season, for example, when the weather becomes cold, make sure to add clothes in time, go to less populated places, pay attention to ventilation indoors, pay attention to hand hygiene, wear a mask, and avoid overexertion. Most of the cases of influenza can be cured by themselves after taking rest and drinking more hot water. If you have the flu, you should go to a respiratory clinic and take medication under the treatment of a doctor.