Collignon, Peter J Impact of pneumococcal polysaccharide vaccine in people aged 65 years or older. [electronic resource] - The Medical journal of Australia Aug 2014 - 199-200 p. digital Publication Type: Letter; Comment ISSN: 1326-5377 Standard No.: 10.5694/mja14.00272 doi Subjects--Topical Terms: HumansPneumococcal Infections--epidemiologyPneumococcal Vaccines--administration & dosageStreptococcus pneumoniae--immunology