title: An expanded pneumococcal vaccine.
mesh_terms: D001428:Bacterial Vaccines / Q000009:adverse effects; D006801:Humans; D011008:Pneumococcal Infections / Q000517:prevention & control; D022242:Pneumococcal Vaccines; D012306:Risk
chemical_list: D001428:Bacterial Vaccines; D022242:Pneumococcal Vaccines