Pneumococcal vaccine.
D001428:Bacterial Vaccines; D006801:Humans; D008875:Middle Aged; D011008:Pneumococcal Infections / Q000517:prevention & control; D022242:Pneumococcal Vaccines; D011014:Pneumonia / Q000517:prevention & control; D013296:Streptococcus pneumoniae / Q000276:immunology*
D001428:Bacterial Vaccines; D022242:Pneumococcal Vaccines