A Study to Demonstrate Non-inferior Immunogenicity of Yuxi Walvax MPV ACYW® Vaccine in Healthy Subjects Aged 2-10 Years

Inclusion Criteria: * Age 2 to 10 years of age (both included) * Written informed consent obtained from the mother, father, or guardian of the child. * Free of obvious health problems and be fully vaccinated according local EPI schedule as established by medical history including physical examination and clinical judgment of the investigator. * Mother, father, or guardian capable and willing to bring their child or to receive home visits for their child for all follow-up visits. * Residence in the study area during the study period. Exclusion Criteria: * Vaccination against group A,C,Y,W Neisseria meningitidis in the previous 3 months * History of allergic disease or known hypersensitivity to any component of the two study vaccines. * History of serious adverse reactions following administration of vaccines included in the local program of immunization. * Administration of any other vaccine within 30 days prior to administration of study vaccines or planned vaccination during the first four weeks after the study vaccination. * Use of any investigational or nonregistered product within 60 days prior to the administration of study vaccines. * Administration of immunoglobulins and/or any blood products or planned administration during the study participation period. * Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying agents since birth (including systemic or inhaled corticosteroids, this means prednisone, or equivalent, ≥0.5…