The Immunogenicity and Safety of the Booster Doses of a Live-attenuated Mumps Vaccine in Junior High School Students

Inclusion Criteria: * Healthy junior high school students; * subjects and/or guardians who can understand and voluntarily sign the informed consent form (For subjects aged 8-17 years, both subjects and guardians need to sign the informed consent form) * Provision of valid identification.; * History of 1 or 2 doses of mumps-containing vaccine; Exclusion Criteria: * History of mumps or have completed 3 doses of mumps-containing vaccine; * Receipt of the current seasonal influenza vaccine (except subjects in Arm 4) * History of asthma or allergy to the vaccine or vaccine components, or serious adverse reactions to the vaccine, such as urticaria, dyspnea,and angioedema; * Congenital malformations or developmental disorders, genetic defects, severe malnutrition; * Autoimmune disease (such as systemic lupus erythematosus) or a state of immunodeficiency / immunosuppression (such as AIDS, after organ transplantation); * Severe chronic diseases, severe cardiovascular diseases, hypertension and diabetes that cannot be controlled by drugs, liver or kidney diseases, malignant tumors, etc.; * Severe neurological disease (epilepsy, convulsions or convulsions) or mental illness; * Thyroid disease or history of thyroidectomy, asplenia, functional asplenia, any condition resulting in asplenia or splenectomy; * Abnormal coagulation function diagnosed by a doctor (such as coagulation factor deficiency, coagulation disease, platelet abnormality) or obvious bruising or coagulation disorder; * …