Influenza is contagious during the incubation period, and it is advisable to take personal precautions and avoid going to crowded places during the influenza epidemic season. Influenza, also known as influenza, is caused by infection with the influenza virus. Influenza is often spread through respiratory droplets and close contact. When influenza is in the incubation period, the body has been infected with influenza virus, at this time the infected person does not have any clinical symptoms, its detoxification ability is poor, but there is still the possibility of discharging the virus to the outside world, so it is still infectious. Avoid going to crowded places during the influenza epidemic season. Personal protection, such as wearing a mask, can to a certain extent block the spread of influenza virus and reduce the incidence of infection. In addition, the living room also needs to be ventilated frequently to ensure clean indoor air.