Pneumococcal vaccine.
Pennie
R A
RA
D000368:Aged; D000369:Aged, 80 and over; D002170:Canada; D002908:Chronic Disease; D005194:Family Practice; D006291:Health Policy; D006801:Humans; D008875:Middle Aged; D011018:Pneumonia, Pneumococcal / Q000276:immunology / Q000517:prevention & control*; D011634:Public Health; D014611:Vaccination