Pneumococcal vaccine: to use or not.
D001428:Bacterial Vaccines / Q000008:administration & dosage*; D002986:Clinical Trials as Topic; D003362:Cost-Benefit Analysis; D006279:Health Maintenance Organizations; D006801:Humans; D011018:Pneumonia, Pneumococcal / Q000517:prevention & control*; D012306:Risk; D013296:Streptococcus pneumoniae / Q000276:immunology*; D014481:United States; D014611:Vaccination / Q000191:economics*
D001428:Bacterial Vaccines