title: Flu vaccine well worth the price in elderly patients.
mesh_terms: D000368:Aged; D003362:Cost-Benefit Analysis; D006801:Humans; D007252:Influenza Vaccines / Q000191:economics* / Q000627:therapeutic use; D007251:Influenza, Human / Q000191:economics* / Q000517:prevention & control
chemical_list: D007252:Influenza Vaccines