Study to Evaluate the Immune Response After a Booster Dose of a Quadrivalent Meningococcal (MenACYW) Conjugate Vaccine When Administered Alone or Concomitantly With a Licensed Meningococcal Serogroup B Vaccine, in Participants Who Received Primary Quadrivalent Meningococcal Conjugate Vaccine (MCV4)

Study duration per participant was approximately 6 months including: 1 day of screening and vaccination, 1 or 2 additional visits at Day 6 and Day 30, 2 phone calls and a safety follow-up/end of study visit, at Day 8 and Day 180 after vaccine administration, respectively.

Safety assessment included solicited reactions within 7 days after vaccination, unsolicited adverse events (AEs) up to 30 days after vaccination, serious adverse events (SAEs) throughout the study.

Inclusion criteria

• Aged >= 13 to less than (<) 26 years on the day of inclusion.
• Participants participated in and completed study MET50 (MET50 Groups 1, 2, or 3 only) or study MET43 (MET43 Groups 1, 2, or 3 only).
• For MET59 Group 2 only (Menveo vaccine-primed participants only; enrichment population): participants had a documented record of having received 1 dose of Menveo vaccine 3-6 years earlier either as part of a clinical trial or as routine vaccination. Participants who participated in MET50 Group 4 can be enrolled if they fulfill this criterion.
• Participants aged 13 to < 18 years: assent form had been signed and dated by the participant and informed consent form (ICF) had been signed and dated by the parent or guardian.
• Participants aged >=18 (or legal age of majority, if different from 18 years of age) to < 26 years: ICF had been signed and dated by the participants.
• Participant aged 13 to < 18 years: both the participant and parent or guardian were able to attend all scheduled visits and complied with all trial procedures.
• Participants aged >=18 (or legal age of majority, if different from 18 years of age) to < 26 years: able to attend all scheduled visits and complied with all trial procedures.

Exclusion criteria

• Participant was pregnant, or lactating, or of childbearing potential and not using an effective method of contraception or abstinence from at least 4 weeks prior to the first vaccination until at least 4 weeks after the last vaccination. To be considered of non-childbearing potential, a female must be pre-menarche, or post-menopausal for at least 1 year, or surgically sterile.
• Participation 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.
• Receipt of any vaccine in the 4 weeks (28 days) preceding the trial vaccination or planned receipt of any vaccine before Visit 3 (Day 30) except for influenza vaccination, which might be received at least 2 weeks before study investigational vaccine.
• Receipt of immune globulins, blood or blood-derived products in the past 3 months.
• Receipt of any meningococcal vaccine including a licensed or investigational MenACWY vaccine or MenB vaccine since participation in study MET50 or MET43.
• Menveo vaccine-primed participants only (enrichment group for Group 2): receipt of more than 1 dose of Menveo vaccine or vaccination with another licensed or investigational MenACWY vaccine or with a licensed or investigational MenB vaccine.
• 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 travelling to countries with high endemic or epidemic disease).
• 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.
• Personal history of Guillain-Barré syndrome.
• Personal history of an Arthus-like reaction after vaccination with a tetanus toxoid-containing vaccine within at least 10 years of the proposed study vaccination.
• Verbal report of thrombocytopenia, contraindicating IM vaccination.
• Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM vaccination.
• Current alcohol abuse or drug addiction.
• Chronic illness (e.g., Human immunodeficiency viruses, hepatitis B, hepatitis C) that, in the opinion of the investigator, was 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 >= 100.4 degree Fahrenheit). A prospective participant should not be included in the study until the condition had resolved or the febrile event had subsided.
• Receipt of oral or injectable antibiotic therapy within 72 hours prior to the first blood draw.
• Identified as an Investigator or employee of the Investigator or study center with direct involvement in the proposed study, or identified as an immediate family member (i.e, parent, spouse, natural or adopted child) of the Investigator or employee with direct involvement in the proposed study.

The above information was not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.