title: Two Authors Reply.
authors.affiliation: Department of Population Medicine, Harvard Medical School, Boston, MA Department of Population Medicine, Harvard Pilgrim HealthCare Institute, Boston, MA Department of Medicine, Division of Infectious Diseases, Brigham and Women's Hospital, Boston, MA.
authors.forename: Meghan A
authors.initials: MA
authors.lastname: Baker
authors.affiliation: Division of Research, Kaiser Permanente Northern California, Oakland, CA.
authors.forename: Bruce H
authors.initials: BH
authors.lastname: Fireman
mesh_terms: D006801:Humans; D007114:Immunization / Q000009:adverse effects*; D061214:Patient Safety; D011358:Product Surveillance, Postmarketing / Q000379:methods*; D014612:Vaccines / Q000009:adverse effects*
chemical_list: D014612:Vaccines