title: Letter to the editor: Regarding the editorial by Penttinen and Friede.
authors.affiliation: Influenza Division, National Centers for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, United States.
authors.forename: Alicia M
authors.initials: AM
authors.lastname: Fry
authors.forename: Brendan
authors.initials: B
authors.lastname: Flannery
authors.forename: Sonja J
authors.initials: SJ
authors.lastname: Olsen
authors.forename: Lisa
authors.initials: L
authors.lastname: Grohskopf
authors.forename: Joseph
authors.initials: J
authors.lastname: Bresee
mesh_terms: D000914:Antibodies, Viral; D006801:Humans; D007114:Immunization; D009980:Influenza A virus / Q000276:immunology*; D007252:Influenza Vaccines; D007251:Influenza, Human
chemical_list: D000914:Antibodies, Viral; D007252:Influenza Vaccines
keywords: influenza; influenza virus; vaccines and immunization