In 1955, a vaccine was developed that used weakened forms of the virus. This vaccine and the subsequent Sabin vaccine nearly wiped out polio in the world
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There has been slavery throughout history, it has never been completely eradicated and is still happening today.
It is extremly unlikely given that the disease has been all but eradicated with the exception of a few strains kept in isolation in the United States and Russia.
Smallpox was eradicated through the effective Intensified Smallpox Eradication Programme, initiated by the World Health Organization. On 26 July 1978, WHO announced the eradication of the smallpox strain Variola Minor. The more deadly strain, Variola Major, had been eradicated several years earlier, in 1975. There remains a stockpile of the virus in storage in 600 frozen vials in Atlanta and Russia. This has been deemed necessary, in case further vaccines are required in the future. This stockpile was supposed to be destroyed on 31 December 1993, but on 23 December 1993, the U.S. Centers for Disease Control, Atlanta, Georgia reversed their decision, announcing that the remaining virus stockpile would not be destroyed, so as to enable scientists to continue studying the disease.
France
nearly 1,000 town have been distroyed.