title: Continuing controversy: pneumococcal vaccine and COPD.
mesh_terms: D001428:Bacterial Vaccines; D006801:Humans; D008173:Lung Diseases, Obstructive; D022242:Pneumococcal Vaccines; D011018:Pneumonia, Pneumococcal / Q000517:prevention & control*; D012306:Risk; D013296:Streptococcus pneumoniae / Q000276:immunology; D014611:Vaccination
chemical_list: D001428:Bacterial Vaccines; D022242:Pneumococcal Vaccines