title: Update: pneumococcal polysaccharide vaccine usage--United States.
mesh_terms: D000293:Adolescent; D000328:Adult; D001428:Bacterial Vaccines / Q000008:administration & dosage* / Q000592:standards; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007115:Immunization Schedule; D008875:Middle Aged; D011008:Pneumococcal Infections / Q000517:prevention & control; D022242:Pneumococcal Vaccines; D011247:Pregnancy; D013296:Streptococcus pneumoniae / Q000276:immunology*; D014481:United States
chemical_list: D001428:Bacterial Vaccines; D022242:Pneumococcal Vaccines