title: The current status of polyvalent pneumococcal vaccine.
mesh_terms: D001428:Bacterial Vaccines / Q000008:administration & dosage*; D002986:Clinical Trials as Topic; D006801:Humans; D011008:Pneumococcal Infections / Q000517:prevention & control*; D022242:Pneumococcal Vaccines; D013296:Streptococcus pneumoniae / Q000276:immunology*; D014481:United States
chemical_list: D001428:Bacterial Vaccines; D022242:Pneumococcal Vaccines