«Smallpox».Armed Forces Institute of Pathology: Department of Infectious and Parasitic Diseases. Arxivat de l'original el 2007-10-09.[Consulta: 28 octubre 2008].
«CDC Smallpox».Smallpox Overview. Arxivat de l'original el 2013-04-02.[Consulta: 26 desembre 2007].
emergency.cdc.gov
«Smallpox Disease and Its Clinical Management»(pdf).From the training course titled "Smallpox: Disease, Prevention, and Intervention" (www.bt.cdc.gov/agent/smallpox/training/overview). Arxivat de l'original el 2016-05-10.[Consulta: 26 desembre 2007].
Henderson D. A., Inglesby T. V., Bartlett J. G. et al.«Smallpox as a biological weapon: medical and public health management. Working Group on Civilian Biodefense».JAMA,281,22,1999,p.2127–37. DOI: 10.1001/jama.281.22.2127. PMID: 10367824.
Dubochet J., Adrian M., Richter K., Garces J., Wittek R.«Structure of intracellular mature vaccinia virus observed by cryoelectron microscopy».J. Virol.,68,3,1994,p.1935–41. PMID: 8107253.
Henderson D. A., Inglesby T. V., Bartlett J. G. et al.«Smallpox as a biological weapon: medical and public health management. Working Group on Civilian Biodefense».JAMA,281,22,1999,p.2127–37. DOI: 10.1001/jama.281.22.2127. PMID: 10367824.
Riedel S«Smallpox and biological warfare: a disease revisited».Proc (Bayl Univ Med Cent),18,1,Gener 2005,p.13–20. PMC: 1200695. PMID: 16200143[Consulta: 9 desembre 2008].
«Smallpox».Armed Forces Institute of Pathology: Department of Infectious and Parasitic Diseases. Arxivat de l'original el 2007-10-09.[Consulta: 28 octubre 2008].
«CDC Smallpox».Smallpox Overview. Arxivat de l'original el 2013-04-02.[Consulta: 26 desembre 2007].
«Smallpox Disease and Its Clinical Management»(pdf).From the training course titled "Smallpox: Disease, Prevention, and Intervention" (www.bt.cdc.gov/agent/smallpox/training/overview). Arxivat de l'original el 2016-05-10.[Consulta: 26 desembre 2007].