Unlicensed flu vaccine reported in USA.
D017277:Drug Approval; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage / Q000494:pharmacology*; D007251:Influenza, Human / Q000517:prevention & control*; D008004:Licensure; D018570:Risk Assessment; D014481:United States; D014486:United States Food and Drug Administration; D014611:Vaccination / Q000592:standards / Q000639:trends
D007252:Influenza Vaccines