Synonyms : Meningitis, Meningococcal, Serogroup A, Meningitis, Meningococcal, Serogroup B, Meningitis, Meningococcal, Serogroup C, Meningitis, Meningococcal, Serogroup W-135, Meningitis, Meningococcal, Serogroup W135, Meningitis, Meningococcal, Serogroup Y