title: Pneumococcal polysaccharide vaccine prevents death from pneumonia in Papua New Guinean children.
mesh_terms: D001428:Bacterial Vaccines; D002675:Child, Preschool; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D006801:Humans; D007223:Infant; D010219:Papua New Guinea; D022242:Pneumococcal Vaccines; D011018:Pneumonia, Pneumococcal / Q000401:mortality / Q000517:prevention & control*
chemical_list: D001428:Bacterial Vaccines; D022242:Pneumococcal Vaccines