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The eradication of the smallpox virus is certified, making smallpox the first of only two diseases that have been driven to extinction (with rinderpest in 2011 being the other).
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Smallpox
Eradicated viral disease
Smallpox was an infectious disease caused by Variola virus, which belongs to the genus Orthopoxvirus. 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, making smallpox…Source: Wikipedia (CC BY-SA)
Virus
Infectious agent that replicates in cells
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Viruses are found in almost every ecosystem on Earth and are the…Source: Wikipedia (CC BY-SA)
Rinderpest
Eradicated morbillivirus disease
Rinderpest was an infectious viral disease of cattle, domestic water buffalo, and many other species of even-toed ungulates, including gaurs, buffaloes, large antelope, deer, giraffes, wildebeests, and warthogs. The disease was characterized by fever, oral erosions, diarrhea,…Source: Wikipedia (CC BY-SA)