Immunogenicity and Safety of a Live Attenuated Varicella Vaccine in Children Aged 1-12 Years

Inclusion Criteria: * Ages ranging from 1 to 12 years for the general healthy population ; * Obtain informed consent from the volunteer and/or their legal guardian, and sign the informed consent form; * The volunteer and/or their legal guardian is able to comply with the requirements of the clinical trial protocol; * Axillary body temperature ≤37.0℃. Exclusion Criteria: * Those who have previously been vaccinated against varicella, have a history of varicella or herpes zoster infection; * Allergy to known components of the study vaccine, or a history of severe allergic reactions to any vaccination; * A history of epilepsy, seizures, or convulsions, or a family history of psychiatric disorders; * Individuals with immunodeficiency, undergoing immunosuppressive therapy (e.g., oral corticosteroids), or HIV-related immunocompromised individuals, or those with family members closely exposed to congenital immune diseases; * Those with congenital malformations, developmental disorders, or severe chronic diseases (such as Down syndrome, diabetes, sickle cell anemia, neurological disorders, Guillain-Barré syndrome); * Known or suspected concurrent diseases, including respiratory diseases, acute infections, or active chronic diseases, cardiovascular diseases, skin diseases, severe hypertension, or during treatment for malignant tumors; * Diagnosed with coagulation dysfunction (e.g., deficiency of coagulation factors, coagulation disorders, platelet abnormalities) or significant bruising or coagulation disorders; * Receipt of blood products within the past 3 months; * Receipt of attenuated live vaccines within the past 14 days or subunit or inactivated vaccines within the past 7 days; * Acute illnesses or acute exacerbations of chronic diseases in the past 7 days; * A history of high fever (axillary body temperature ≥38.0℃) within the past 3 days; * Any other factors deemed by the investigator as unsuitable for participation in the clinical trial.