Infants usually do not have specific reactions to chickenpox vaccination, but may have adverse reactions such as cough, upper respiratory illness, irritability, fatigue, and diarrhea. When varicella vaccination is given to children 12 months to 12 years of age, the first dose is given at 12 to 15 months of age but can be given at any time at ≤12 years of age, and the second dose is usually given at 4 to 6 years of age, with a minimum of three months between the first and second doses, and at least one month between measles-containing and varicella-containing vaccines, if not given at the same time. Patients ≥13 years of age should have at least 4 weeks between two varicella vaccinations. Adverse reactions such as upper respiratory illness, irritability, cough, diarrhea, sleep deprivation, fatigue, vomiting, loss of appetite, diaper rash, otitis media, headache, teething, abdominal pain and eye irritation, stiff neck, constipation, myalgia, and sleep disturbances may occur after varicella vaccination. It is contraindicated in patients with severe allergic reactions, patients with immunosuppression, patients with moderate to severe hyperthermia, patients with untreated active tuberculosis, pregnant women, and patients who plan to become pregnant within three months. Patients are advised to go to regular hospitals for consultation if they feel unwell, and follow the doctor’s instructions for symptomatic treatment.