Author Contributions: Dr Sejvar 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: Sejvar, Chapman, Grabenstein, Iskander.
Acquisition of data: Sejvar, Labutta, Chapman, Grabenstein, Iskander, Lane.
Analysis and interpretation of data: Sejvar, Labutta, Chapman, Grabenstein, Lane.
Drafting of the manuscript: Sejvar, Chapman, Grabenstein, Lane.
Critical revision of the manuscript for important intellectual content: Sejvar, Labutta, Chapman, Grabenstein, Iskander, Lane.
Statistical analysis: Sejvar.
Obtained funding: Sejvar.
Administrative, technical, or material support: Sejvar, Chapman, Grabenstein, Iskander.
Study supervision: Sejvar, Chapman, Grabenstein, Lane.
Financial Disclosures: None reported.
Funding/Support: This study was supported by the Centers for Disease Control and Prevention (CDC) and the US Department of Defense.
Role of the Sponsor: The Departments of Health and Human Services (CDC) and Defense reviewed and approved the manuscript.
Disclaimer: The content of this article reflects the views of the authors and does not necessarily reflect the official position of the CDC, the Department of the Army, Department of Defense, Department of Health and Human Services, or the US government.
Acknowledgment: We thank the Advisory Committee on Immunization Practices–Armed Forces Epidemiological Board joint Smallpox Vaccine Safety Working Group, as well as the many other parties whose work enabled the observations reported here, including entities of the US Department of Defense and the US Department of Health and Human Services; colleagues in the pharmaceutical industry (Wyeth and Acambis); civilian and military health care professionals; state, territorial, county, city, and local health department professionals; and the civilian response team and monitoring activity volunteers. We thank Claudia Chesley, BA, for review and editing of the manuscript.
This article was corrected on 12/5/2005, prior to publication of the correction in print.