title: Regulators face tough flu-jab choices.
authors.forename: Declan
authors.initials: D
authors.lastname: Butler
mesh_terms: D000276:Adjuvants, Immunologic; D000956:Antigens, Viral / Q000276:immunology; D004196:Disease Outbreaks / Q000517:prevention & control*; D005060:Europe; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000276:immunology*; D007252:Influenza Vaccines / Q000191:economics / Q000276:immunology* / Q000592:standards / Q000600:supply & distribution; D007251:Influenza, Human / Q000517:prevention & control*; D014481:United States; D014944:World Health Organization
chemical_list: D000276:Adjuvants, Immunologic; D000956:Antigens, Viral; D007252:Influenza Vaccines