Pneumococcal polysaccharide vaccines.
D000328:Adult; D001428:Bacterial Vaccines / Q000276:immunology*; D002648:Child; D006801:Humans; D011008:Pneumococcal Infections / Q000517:prevention & control*; D011135:Polysaccharides, Bacterial / Q000276:immunology*
D001428:Bacterial Vaccines; D011135:Polysaccharides, Bacterial