Varicella-zoster virus can be transmitted by droplets from patients, so wearing a mask is useful for prevention. In addition to droplet transmission, contact with items newly contaminated by the blister fluid of patients with varicella-zoster virus can also be infectious. The high incidence of chickenpox is in kindergartens, primary and secondary schools, and group places, and the high incidence season is mainly in winter and spring. Chickenpox patients from the appearance of fever symptoms to the scab period are infectious period, highly contagious, children are common, to a certain stage will stop or self-healing, chickenpox rash is centripetal distribution, can be seen spots, papules, herpes blisters and crusted rash. Most patients can form antibodies in the body after recovery and are no longer infected with chickenpox, but the latent virus in the body can cause herpes zoster when it is activated later.