title: Introduction: vaccination against smallpox in the posteradication era.
abstract: The following introduction describes the context in which the national smallpox vaccination program was implemented and highlights the significance of the key policy, programmatic, or scientific challenges, observations, and lessons learned that are presented in the articles that follow within this supplement to Clinical Infectious Diseases. Although the execution of this national program posed multiple complex and varied challenges, the focus of this supplement is on vaccine-associated adverse events and vaccine safety.
authors.affiliation: Centers for Disease Control and Prevention, Atlanta, Georgia, USA. lec3@cdc.gov
authors.forename: Louisa E
authors.initials: LE
authors.lastname: Chapman
authors.forename: Gina T
authors.initials: GT
authors.lastname: Mootrey
authors.forename: Linda J
authors.initials: LJ
authors.lastname: Neff
mesh_terms: D000293:Adolescent; D000328:Adult; D016907:Adverse Drug Reaction Reporting Systems; D000368:Aged; D005260:Female; D006801:Humans; D007117:Immunization, Secondary; D008297:Male; D032541:Mass Vaccination / Q000009:adverse effects; D008875:Middle Aged; D011159:Population Surveillance; D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000009:adverse effects*; D014481:United States
chemical_list: C078786:DryVax vaccine; D012900:Smallpox Vaccine