Study of a Quadrivalent Meningococcal Conjugate Vaccine in Subjects Aged 56 and Older

Inclusion Criteria: * Aged 56 or older on the day of inclusion. * Informed consent form had been signed and dated. * Able to attend all scheduled visits and complied with all trial procedures. Exclusion Criteria: * Participant was pregnant, or lactating, or of childbearing potential (were considered of non-childbearing potential, a female must be post-menopausal for at least 1 year, surgically sterile, or used an effective method of contraception or abstinence from at least 4 weeks prior to vaccination and until at least 4 weeks after vaccination). * 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. * Receipt of any vaccine in the 4 weeks preceding the trial vaccination or planned receipt of any vaccine in the 4 weeks following the trial vaccination except for influenza vaccination, which might be received at least 2 weeks before or after the study vaccines. * Previous vaccination against meningococcal disease with either a trial vaccine or another vaccine. * Receipt of immune globulins, blood or blood-derived products in the past 3 months. * 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 (predn…