title: Pneumococcal polysaccharide vaccine: a systematic review of clinical effectiveness in adults.
abstract: Pneumococcal polysaccharide vaccine is recommended in western countries for individuals at high risk of pneumococcal illness. We undertook a systematic review of randomised controlled trials of pneumococcal vaccine in adults, to determine the effects on clinical outcomes.
  
  
  RESULTS
  In industrialised populations, no benefit was detected for outcomes other than pneumococcal bacteraemia, and this did not reach statistical significance. In non-industrial populations, clear benefit was demonstrated for mortality and all-cause pneumonia.
  
  
  CONCLUSIONS
  Benefit from pneumococcal vaccination depends on the baseline risk of infection and characteristics of a given population. Evidence from randomised trials for widespread adult vaccination in industrial countries is lacking.
authors: Department of Public Health Medicine, Grampian Health Board, Aberdeen, UK. lorna.watson@isd.csa.scot.nhs.uk
authors: Lorna
authors: L
authors: Watson
authors: Brenda J
authors: BJ
authors: Wilson
authors: Norman
authors: N
authors: Waugh
mesh_terms: D000328:Adult; D006801:Humans; D011008:Pneumococcal Infections / Q000517:prevention & control*; D022242:Pneumococcal Vaccines / Q000627:therapeutic use*
chemical_list: D022242:Pneumococcal Vaccines