Study on an Investigational Quadrivalent Meningococcal Conjugate Vaccine (MenACYW Conjugate Vaccine) Administered as a 5- and/or 10-year Booster Doses in Children and Adolescents Vaccinated 5 or 10 Years Earlier as Toddlers

The purpose of the MEQ00073 study is to assess the immunogenicity and safety of a booster dose in children who had been vaccinated with MenACYW conjugate vaccine approximately 5 years earlier as toddlers as part of the MET51 study, and to describe the persistence of a priming dose in children and adolescents who had been vaccinated with MenACYW conjugate vaccine approximately 5 years or 10 years earlier as toddlers as part of the MET51 study, the immunogenicity and safety of a booster dose in adolescents who had been primed with MenACYW conjugate vaccine as toddlers as part of the MET51 study, and the immunogenicity and safety of a second booster dose in adolescents approximately 5 years after a first booster dose as children approximately 5 years after the priming dose as toddlers.

The duration of each participant's participation will be approximately 5.5 years

Eligibility Criteria:
Inclusion Criteria:

* Received MenACYW vaccine in MET51 study (Groups 1 and 3) and completed the study (attended Visit 2)
* Participant and parent/ legally acceptable representative (LAR) are able to attend all scheduled visits and to comply with all trial procedures
* Covered by health insurance, if required by local regulations

Exclusion Criteria:

* Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months)
* History of meningococcal infection, confirmed either clinically, serologically, or microbiologically
* At high risk for meningococcal infection during the trial (specifically but not limited to participants with persistent complement deficiency, with anatomic or functional asplenia, or participants traveling to countries with high endemic or epidemic disease)
* Personal history of Guillain-Barré syndrome (GBS)
* Personal history of an Arthus-like reaction after vaccination with a tetanus toxoid containing vaccine
* Known systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to the vaccines used in the trial or to a vaccine containing any of the same substances
* Verbal report by parent or LAR of thrombocytopenia or suspected thrombocytopenia, contraindicating intramuscular (IM) vaccination
* Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM vaccination
* Previous vaccination against meningococcal disease with either the trial vaccine or another vaccine (ie, mono- or polyvalent, polysaccharide, or conjugate meningococcal vaccine containing serogroups A, C, W, or Y) with the exception of licensed MenC vaccination received during infancy (MET51 Group 3), of the single dose of meningococcal vaccine administered as part of study MET51 (Group 1 and 3) and of Meningococcal B vaccine
* Receipt of any vaccine in the 4 weeks preceding the trial vaccination or planned receipt of any vaccine in the 4 weeks following trial vaccination except for influenza vaccination, which may be received at least 2 weeks before or after study vaccines. This exception includes monovalent pandemic influenza vaccines and multivalent influenza vaccines
* Receipt of immune globulins, blood or blood-derived products in the past 3 months
* Receipt of oral or injectable antibiotic therapy within 72 hours prior to the first blood draw
* Participation at the time of study enrollment (or in the 4 weeks preceding the trial vaccination) or planned participation during the present trial period in another clinical trial investigating a vaccine, drug, medical device, or medical procedure
* Chronic illness that, in the opinion of the Investigator, is at a stage where it might interfere with trial conduct or completion
* Moderate or severe acute illness/infection (according to Investigator judgment) on the day of vaccination or febrile illness (temperature ≥ 38.0°C). A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided
* Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily
* Identified as a natural or adopted child of the Investigator or employee with direct involvement in the proposed study
* The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.