title: Pneumococcal pneumonia vaccine--strange success story.
mesh_terms: D001428:Bacterial Vaccines / Q000266:history; D004345:Drug Industry; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011018:Pneumonia, Pneumococcal / Q000517:prevention & control*; D014481:United States
chemical_list: D001428:Bacterial Vaccines