The chickenpox vaccine for children requires two shots. Varicella vaccine is a live attenuated vaccine made from an attenuated strain of varicella-zoster virus, which is effective in preventing the occurrence of chickenpox after vaccination. Therefore, vaccination is recommended for children, adolescents and adults with no history of chickenpox. Children should receive the first vaccination at the age of 12 months to 15 months, and the second vaccination at the age of 4 years to 6 years; children aged 13 years and above need to receive two vaccinations, and the interval between the two vaccinations should be paid attention to 6 to 10 weeks. Before vaccination, pay attention to the existence of dermatitis, purulent skin disease, severe eczema, severe malnutrition, severe rickets, congenital immunodeficiency and other conditions that should not be vaccinated, in addition to allergic children need to be cautious of vaccination. It is recommended to consult a professional doctor for standardized vaccination if necessary.