title: What did they know, and  when did they know it?
authors.forename: Charlotte
authors.initials: C
authors.lastname: Haug
mesh_terms: D002648:Child; D017277:Drug Approval; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007252:Influenza Vaccines / Q000009:adverse effects*; D032541:Mass Vaccination; D009290:Narcolepsy / Q000139:chemically induced*; D009664:Norway; D014944:World Health Organization
chemical_list: D007252:Influenza Vaccines