Vaccine against meningococcal disease.
D001428:Bacterial Vaccines; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008585:Meningitis, Meningococcal / Q000517:prevention & control*; D009345:Neisseria meningitidis / Q000276:immunology*
D001428:Bacterial Vaccines