The best time for varicella vaccination is between 12~18 months of age for the first injection, and after 4 years of age for the second injection. Chickenpox is an acute infectious skin disease caused by varicella-zoster virus infection, which is highly contagious, and is prevalent in children, and can be transmitted through respiratory droplets and direct contact, and infected persons may develop papules, blisters and scabs all over the body, which may lead to death in severe cases. The best time for its vaccination is between 12 to 18 months of age for infants and young children, usually the earlier the vaccination, the earlier the benefit. after 4 years of age, the second vaccination. Varicella vaccine includes live attenuated varicella vaccine and live freeze-dried varicella virus vaccine. Varicella vaccination can stimulate the body to produce immunity against varicella virus, which is used to prevent varicella. There is no adverse reaction to varicella vaccination, but a few people may have transient fever or rash, which can be eliminated on its own, if special treatment is needed. Chickenpox vaccine is the second type of vaccine stipulated by the state, which is a self-funded vaccine and can be given voluntarily, and it is recommended to get vaccinated in time to prevent the occurrence of chickenpox.