title: Complexities in assessing the effectiveness of inactivated influenza vaccines.
authors: H
authors: H
authors: Kelly
authors: I
authors: I
authors: Steffens
mesh_terms: D006801:Humans; D009980:Influenza A virus / Q000276:immunology*; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000276:immunology / Q000627:therapeutic use; D007251:Influenza, Human / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control*; D016896:Treatment Outcome; D015164:Vaccines, Inactivated / Q000008:administration & dosage* / Q000627:therapeutic use
chemical_list: D007252:Influenza Vaccines; D015164:Vaccines, Inactivated