Varicella is a contagious rash disease caused by varicella-herpes virus, which is transmitted mainly by contact and respiratory droplets, and the population is generally susceptible to varicella-zoster virus, which means that the virus is highly transmissible. To prevent the spread of infectious diseases, it is necessary to isolate the source of infection, cut off the transmission route, and protect the susceptible population. The source of infection is the patient who has chickenpox, either in the incubation period or in the rash, and should be well isolated so as not to infect others. In view of the fact that the only means of transmission is through contact and respiratory droplet transmission, both patients and ordinary people should develop the habit of wearing a mask during the epidemic season. If you have chickenpox patients at home, avoid direct contact with chickenpox herpes fluid and develop the good habit of washing hands regularly. For the protection of susceptible people, the main thing is that chickenpox vaccine can be administered to susceptible people. The most effective way to prevent chickenpox is to get the chickenpox vaccine. The live attenuated varicella vaccine is the only vaccine approved for the prevention of human herpesvirus infection. Healthy children who receive a single dose of varicella vaccine can have a positive antibody transfer rate of about 95%, while children who have been infected with chickenpox need to be strictly isolated during this period to avoid transmission because the rash is contagious from 1 day before the rash appears until it is completely crusted over.