Swine flu revisited.
D006801:Humans; D007252:Influenza Vaccines / Q000009:adverse effects*; D007251:Influenza, Human / Q000517:prevention & control*; D007603:Jurisprudence; D011129:Polyradiculoneuropathy / Q000209:etiology*; D011634:Public Health; D014481:United States
D007252:Influenza Vaccines