Chickenpox is a virus, a common acute infectious disease caused by varicella-zoster virus, which can develop throughout the year, with winter and spring being the most common. It is extremely contagious, and more than 90% of children who have not had chickenpox will develop the disease within 1-3 weeks once they are in contact with an affected child. The patient is the only source of infection, mainly through saliva droplet transmission, but also from contact with chickenpox virus contaminated clothing, toys, utensils and other diseases. How to prevent it? 1, reduce contact, prevent infection: chickenpox high period, parents should try to take their children to hospitals and other public places, avoid children contact with chickenpox or shingles patients to prevent infection with chickenpox. Schools and kindergartens where chickenpox is present should stop holding large events to reduce the chance of transmission. Children who have been in contact with patients should be observed for 21 to 28 days. 2. Open windows to keep the air circulating and the environment tidy. Students should go outside between classes. Classes with students with chicken pox can be scrubbed with 84 disinfectant with water (ratio is 1:100) for desks, chairs and learning utensils, or sprayed with 1:100 of 84 disinfectant for air disinfection (doors and windows need to be closed when disinfecting the classroom), or UV disinfection can be used. 3. The most ideal and effective way to prevent chickenpox is to get vaccinated. Contact with chickenpox patients may be infected with the chickenpox virus, but the use of chickenpox vaccine within 3 to 5 days after contact can effectively prevent the occurrence of chickenpox or reduce the severity of the disease. If the vaccine is administered when the virus is already present, the disease may develop, but the symptoms of the disease are apparently mild, skin damage is minimal, and most people do not develop a fever. Vaccination in such cases does not add additional damage to the body and can also successfully control chickenpox outbreaks on campus and reduce the number of patients with chickenpox. Studies have confirmed that more than 90% of children aged 12 months to 12 years can have protection for more than 6 years after receiving one dose of subvaccine, and some people have antibodies lasting for more than 10 years. 4. For people with very poor resistance, patients with certain serious diseases (blood diseases, lymphoma and other malignant tumors), pregnant women and premature babies, high efficiency anti varicella-zoster immunoglobulin should be injected as soon as possible within 72 hours, the more timely the injection, the better the effect. 5. Pay attention to personal hygiene and enhance physical fitness: adhere to physical exercise to enhance the ability to resist disease.