Pneumococcal vaccine.
D000367:Age Factors; D000368:Aged; D001428:Bacterial Vaccines / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D010353:Patient Education as Topic; D011018:Pneumonia, Pneumococcal / Q000517:prevention & control*; D012306:Risk; D013296:Streptococcus pneumoniae / Q000276:immunology*
D001428:Bacterial Vaccines