title: You recommend the flu vaccine, but I've heard it doesn't work in older patients. Is this true?
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000276:immunology*; D005260:Female; D006801:Humans; D007252:Influenza Vaccines / Q000592:standards; D007251:Influenza, Human / Q000517:prevention & control*; D008297:Male
chemical_list: D007252:Influenza Vaccines