Smallpox was globally eradicated in the 1970s. Any case of smallpox means a bioterrorism event. Blisters (vesicles) develop all at the same stage, in contrast to chickenpox, where lesions are in different forms at the same time.  The blisters of smallpox are always at the same stage at the same time.
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Smallpox (Variola)  Information for adults

Picture of Smallpox (Variola): Smallpox was globally eradicated in the 1970s. Any case of smallpox means a bioterrorism event. Blisters (vesicles) develop all at the same stage, in contrast to chickenpox, where lesions are in different forms at the same time.  Divider line
Smallpox was globally eradicated in the 1970s. Any case of smallpox means a bioterrorism event. Blisters (vesicles) develop all at the same stage, in contrast to chickenpox, where lesions are in different forms at the same time.
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References


Frequently asked questions about smallpox. Centers for Disease Control and Prevention Web site. http://emergency.cdc.gov/agent/smallpox/disease/faq.asp. Modified December 29, 2004. Reviewed February 6, 2007. Accessed May 30, 2008.

Smallpox. Logical Images Web site. http://www.logicalimages.com/resourcesBTAgentsSmallpox.htm. Accessed June 5, 2008.

Smallpox disease overview. Centers for Disease Control and Prevention Web site. http://emergency.cdc.gov/agent/smallpox/overview/disease-facts.asp. Modified December 30, 2004. Reviewed February 6, 2007. Accessed May 30, 2008.

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MedlinePlus: Smallpox

Last Modified: 22 Dec 2008