Too little, too late.
D004196:Disease Outbreaks / Q000517:prevention & control*; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control*; D014481:United States; D014611:Vaccination / Q000009:adverse effects / Q000331:legislation & jurisprudence / Q000523:psychology; D014765:Viral Vaccines / Q000009:adverse effects / Q000600:supply & distribution*
D014765:Viral Vaccines