Recently, primary and middle schools as well as kindergartens have started. Children usually have weak immune capabilities and diseases prevention awareness. Schools, kindergartens, indoor children’s playgrounds and other densely-populated places are likely to become high incidence places for the spread of infectious diseases. Therefore, protection is particularly important especially during the COVID-19 epidemic. Influenza is a highly contagious acute respiratory disease with an incubation period of 1-3 days. Symptoms include high fever, headache, muscle aches, fatigue, runny nose, cough, and sore throat. Children can also show digestive symptoms such as nausea, vomiting and diarrhea. Influenza is mainly spread by respiratory droplets produced by coughing and sneezing. Sometimes it can also be infected by touching objects on the surface with viruses and then touching the mouth and nose. Most people who get the flu will recover within 1-2 weeks without treatment. If the patient takes antiviral drugs within 48 hours after the symptoms appear, the symptoms could be relieved and the course of the disease could be reduced by 1-2 days.