[Meningococcal Conjugate Vaccine | Menactra® (Meningococcal [Groups A, C, Y, and W-135] Polysaccharide Diphtheria Toxoid Conjugate Vaccine) Menactra is indicated for active immunization to prevent invasive meningococcal disease caused by Neisseria meningitidis serogroups A, C, Y, and W-135. Menactra is approved for use in individuals 9 months through 55 years of age. Menactra does not prevent N meningitidis serogroup B disease. Please see Important Safety Information and full Prescribing Information on the website.]