A Phase 3 Lot-consistency Clinical Trial of Live Attenuated Varicella Vaccine

Inclusion Criteria: * Healthy volunteer between 1-3 years old; * legal identity; * Guardian(s) of the volunteer should be capable of understanding the written - consent form, and such form should be signed before the children being included into this study. Exclusion Criteria: * Prior vaccination with varicella vaccine or with history of varicella infection; * Axillaty temperature \> 37.0 °C before vaccination; * History of allergy to any vaccine or vaccine ingredient, or serious adverse reaction(s) to vaccination, such as urticaria, difficulty in breathing, angioneurotic edema, abdominal pain, etc; * Epilepsy (except febrile seizures), history of seizures or convulsions, a family history of mental illness, autoimmune disease, or immunodeficiency; * Severe malnutrition, congenital malformation, developmental disorders, or serious chronic diseases; * Acute disease or acute stage of chronic disease within 7 days prior to study entry; * Receipt of any blood product, immunosuppressant, hormone, other investigational medicine(s) within 30 days prior to study entry; * Receipt of any live attenuated vaccine within 1 month prior to study entry, or receipt of any subunit vaccine or inactivated vaccine within 7 days prior to study entry; * Any significant abnormity of heart, lung, liver, spleen, lymph nodes, or pharynx; * Based on the judgment of investigator(s), there was any condition indicating that the subject should be excluded.