title: Problems with influenza vaccine.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007252:Influenza Vaccines / Q000009:adverse effects / Q000600:supply & distribution*; D007251:Influenza, Human / Q000517:prevention & control; D008875:Middle Aged; D014481:United States; D014611:Vaccination / Q000706:statistics & numerical data
chemical_list: D007252:Influenza Vaccines