Aragón, Tomás J Risks of serious complications and death from smallpox vaccination: a systematic review of the United States experience, 1963-1968. [electronic resource] - BMC public health Aug 2003 - 26 p. digital Publication Type: Journal Article; Review; Systematic Review ISSN: 1471-2458 Standard No.: 10.1186/1471-2458-3-26 doi Subjects--Topical Terms: Bioterrorism--prevention & controlEncephalitis, Viral--chemically inducedHumansMass VaccinationNecrosisRisk AssessmentSmallpox--prevention & controlSmallpox Vaccine--adverse effectsSurvival AnalysisVaccinia--chemically induced