title: Reply to Fedson.
authors.affiliation: Marshfield Clinic Research Foundation, Marshfield, Wisconsin.
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: VanWormer
authors.forename: Allen C
authors.initials: AC
authors.lastname: Bateman
authors.forename: Stephanie A
authors.initials: SA
authors.lastname: Irving
authors.forename: Burney A
authors.initials: BA
authors.lastname: Kieke
authors.forename: David K
authors.initials: DK
authors.lastname: Shay
authors.forename: Edward A
authors.initials: EA
authors.lastname: Belongia
mesh_terms: D005260:Female; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000472:pathogenicity*; D007252:Influenza Vaccines / Q000627:therapeutic use*; D007251:Influenza, Human / Q000517:prevention & control*; D008297:Male; D058873:Pandemics / Q000517:prevention & control*
chemical_list: D007252:Influenza Vaccines