Varicella vaccine is a self-funded vaccine that is not part of the National Immunization Program and is a Class II vaccine that needs to be administered to children of school age at the parents’ discretion. At present, the vaccine coverage in China has not yet reached the effective control or interruption of virus transmission, but varicella vaccination is still necessary. Chickenpox is an acute respiratory infection caused by varicella-zoster virus infection that occurs in children. It is transmitted mainly by droplet and contact and is highly contagious. The main clinical manifestations are papules, blisters and other skin lesions all over the body, and later crusting with itching. If the chickenpox is scratched accidentally, the infection may expand and lead to secondary infection. In addition, symptoms such as fever, dizziness, headache and cough may occur during the onset of the disease, which may be complicated by pneumonia, hepatitis and encephalitis in severe cases. In children with poor immune system, the disease may be life-threatening. Therefore, parents are advised to vaccinate their children against chickenpox if conditions permit. However, if there are conditions that make a child unsuitable for vaccination, such as having other diseases or being allergic to the vaccine, they can choose whether or not to receive the vaccine after consulting a doctor. Vaccination does not necessarily mean that the child will not get sick, but vaccinated children will have less clinical symptoms and recover more easily than non-vaccinated children.