title: Pneumococcal infection after vaccination.
mesh_terms: D000907:Antibodies, Bacterial / Q000096:biosynthesis; D001428:Bacterial Vaccines / Q000276:immunology*; D006801:Humans; D007945:Leukemia, Lymphoid / Q000276:immunology; D008297:Male; D008875:Middle Aged; D011018:Pneumonia, Pneumococcal / Q000209:etiology*; D013296:Streptococcus pneumoniae / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial; D001428:Bacterial Vaccines