Varicella vaccine first and second clinical injection requires an interval of three years, the interval between the corresponding time can play a maximum preventive effect, a large part of the population can produce a long period of resistance. Chickenpox is a disease caused by varicella zoster virus infection, through the injection of the vaccine can be a very good preventive effect; an injection of most of the one-week-old after the age of one year, the interval of three years and then the second injection, most of the people in the regular injection of the body antibodies can last for more than 10 years, and part of the people in the body antibodies will always be there. The vaccine should be administered in good physical condition, and the inoculated person should not be injected when he/she is in fever or acute illness; after the vaccination, pay more attention to rest, do not get the inoculation site wet too early, and closely observe the symptoms and temperature changes.