Precautions for varicella vaccination mainly include paying attention to the sterile environment, caution for those who are allergic to other drugs, and observation after vaccination. Varicella vaccine is live attenuated vaccine, mainly used to prevent chickenpox, the main precautions for the following categories. 1. Cracks in the external package or ampoule, fuzzy labels should not be used, and those who can’t shake the clots after dissolution should not use it, and avoid contacting the vaccine with disinfectant. 2. People with history of convulsions, chronic diseases, epilepsy, allergy to other drugs should be used with caution, those who have received plasma, plasma proteins, other live attenuated vaccines should be postponed, not recommended for use during the epidemic season, all fever, acute infectious diseases should be postponed vaccination. 3. The inoculator should keep the injection site clean, pay attention to avoid contamination, it should be injected subcutaneously, not intradermally, and should be observed after inoculation. 4. Avoid the use of salicylates within 6 weeks after vaccination, and women of childbearing age should pay attention to contraception after vaccination. Vaccination should be carried out in professional preventive institutions, pay attention to avoid wound contamination, pay attention to rest, avoid overwork, eat a light diet, balanced nutrition.