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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.
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 .
Smallpox is a highly contagious viral disease which can be transmitted through direct contact with a person that is already affected with smallpox. Touching clothing, bedding, dust, or any other objects that were previously touched by an infected person can result in transmission of the disease. [ 5 ]
Smallpox was a dangerous disease caused by the variola major virus. The most common type of smallpox, ordinary, historically has devastated populations with a 30% death rate. The smallpox virus is transmittable through bodily fluids and materials contaminated with infected materials.
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]
Years of Research. Years of research go into creating vaccines before they are made available to the public, followed by three phases of testing and clinical trials overseen by the Food and Drug ...
Smallpox is an infectious disease unique to humans, caused by either of two virus variants named Variola major and Variola minor, with the latter typically producing a milder disease. [1] The World Health Organization (WHO) had established a smallpox eradication programme and, by 1978, was close to declaring that the disease had been eradicated ...
Two outbreaks of the disease, which is caused by a virus in the same family as the one that causes smallpox, were discovered in monkeys that were being kept for research. The first human case ...