Author Contributions: Dr Slade had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Leidel, Vellozzi, Izurieta, Ball.
Acquisition of data: Leidel, Vellozzi, Izurieta, Miller.
Analysis and interpretation of data: Slade, Leidel, Vellozzi, Woo, Hua, Sutherland, Izurieta, Ball, Braun, Markowitz, Iskander.
Drafting of the manuscript: Leidel, Vellozzi, Hua, Izurieta.
Critical revision of the manuscript for important intellectual content: Slade, Leidel, Vellozzi, Woo, Sutherland, Izurieta, Ball, Miller, Braun, Markowitz, Iskander.
Statistical analysis: Leidel, Vellozzi, Woo, Hua, Izurieta.
Administrative, technical, or material support: Slade, Leidel, Ball, Braun, Markowitz.
Study supervision: Leidel, Vellozzi, Ball, Braun, Iskander.
Financial Disclosures: None reported.
Funding/Support: The study was implemented by the Centers for Disease Control and Prevention (CDC) and Food and Drug Administration (FDA). The only funds used were from CDC and FDA budgets. This study had no external sponsors.
Role of the Sponsor: The CDC is responsible for the surveillance activities; the collection, management, analysis, and interpretation of the data; and the preparation, review, and approval of the manuscript.
Disclaimer: The findings and conclusions in this article are those of the authors and do not necessarily represent the views of the funding agencies.
Previous Presentation: Portions of these data have been presented to the Advisory Committee on Immunization Practices (ACIP) as well as the ACIP Working Group. Portions of these data on syncope were published in the CDC’s Morbidity and Mortality Weekly Report (Syncope after vaccination: United States, January 2005-July 2007. MMWR Morb Mortal Wkly Rep. 2008;57:457-460). This complete data set has never been published or presented previously. No text or tables from this manuscript have been published previously.