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Smallpox was an infectious disease caused by variola virus (often called smallpox virus), which belongs to the genus Orthopoxvirus. [7] [11] The last naturally occurring case was diagnosed in October 1977, and the World Health Organization (WHO) certified the global eradication of the disease in 1980, [10] making smallpox the only human disease to have been eradicated to date.
Smallpox expert D. A. Henderson has been foremost in favor of destruction, while U.S. Army scientist Peter Jahrling has argued against it on the basis that further research is needed, since he believes that smallpox almost certainly exists outside of the repositories. [11] Other scientists have expressed similar opinions. [12]
In this case, the infected individual becomes infectious at around the same time they start showing symptoms. In certain other infectious diseases such as smallpox or SARS, [5] the host becomes infectious after the onset of symptoms. In this case, the latent period is longer than the incubation period.
WHO’s most notable achievement was the eradication of smallpox, which marked a rare instance of cooperation between the US and the Soviet Union during the Cold War. ... Trump first tried to exit ...
The Massachusetts smallpox epidemic or colonial epidemic was a smallpox outbreak that hit Massachusetts in 1633. [1] Smallpox outbreaks were not confined to 1633 however, and occurred nearly every ten years. [2] Smallpox was caused by two different types of variola viruses: variola major and variola minor. [3]
Smallpox infections spiked in the 1780s and persisted up to the 1837 epidemic. In what is now Canada, the fur trade strengthened communities such as the Mushego Cree , Anishinaabe , and Ottawa . In the United States, the Mandan tribe had previously experienced a major smallpox epidemic in 1780–1781, which severely reduced their numbers to ...
Diseases associated with this genus include smallpox, cowpox, horsepox, camelpox, and mpox. [ 1 ] [ 2 ] The most widely known member of the genus is Variola virus , which causes smallpox. It was eradicated globally by 1977, through the use of Vaccinia virus as a vaccine .
The campaign aimed to provide the smallpox vaccine to those who would respond to an attack, establishing Smallpox Response Teams and using DryVax (containing the NYCBOH strain) to mandatorily vaccinate half a million American military personnel, followed by half a million health care worker volunteers by January 2004.