Pneumococcal vaccine is worth a shot.
Butler
R N
RN
D000368:Aged; D001428:Bacterial Vaccines; D005853:Geriatrics / Q000379:methods*; D006801:Humans; D011018:Pneumonia, Pneumococcal / Q000517:prevention & control*; D011322:Primary Prevention / Q000379:methods*; D000074606:Smoking Prevention; D013296:Streptococcus pneumoniae / Q000276:immunology*
D001428:Bacterial Vaccines