Meningococcal vaccines: polysaccharide and polysaccharide conjugate vaccines.
D004196:Disease Outbreaks; D006801:Humans; D017589:Immunization Programs; D016920:Meningitis, Bacterial / Q000517:prevention & control*; D022401:Meningococcal Vaccines; D011135:Polysaccharides, Bacterial; D018074:Vaccines, Conjugate; D014944:World Health Organization
D022401:Meningococcal Vaccines; D011135:Polysaccharides, Bacterial; D018074:Vaccines, Conjugate