The costs and benefits of preventing influenza in Ontario's elderly.
D000368:Aged; D003362:Cost-Benefit Analysis; D006077:Government Agencies; D006760:Hospitalization / Q000191:economics; D006801:Humans; D007252:Influenza Vaccines / Q000627:therapeutic use*; D007251:Influenza, Human / Q000191:economics / Q000517:prevention & control*; D009864:Ontario; D014611:Vaccination / Q000191:economics
D007252:Influenza Vaccines