title: Pneumococcal polysaccharide vaccine.
mesh_terms: D001428:Bacterial Vaccines; D006801:Humans; D011008:Pneumococcal Infections / Q000517:prevention & control*; D011135:Polysaccharides, Bacterial / Q000276:immunology
chemical_list: D001428:Bacterial Vaccines; D011135:Polysaccharides, Bacterial