Normal vaccination program for chickenpox vaccine: the first dose is given at 12 to 18 months of age, and the second dose is given at 4 to 6 years of age. Vaccination within the normal vaccination program is the best age for vaccination. Generally speaking, chickenpox vaccine is needed to be vaccinated after 12 months of birth, and at the latest at the age of 6 years, and it is the best vaccination time to be vaccinated within the normal vaccination program, and it can be delayed in special circumstances, and the potency may be relatively low. The second shot from the first vaccination time at least 3 months interval, in 3 ~ 4 years to complete the vaccination. Chickenpox is an acute infectious disease caused by varicella zoster infection, mainly through droplet transmission and contact transmission, highly contagious. Varicella vaccine can effectively prevent varicella-zoster virus infection, belongs to the national category II vaccine, can be vaccinated voluntarily.