how has the disease been controlled?
Through vaccination.
Polio
Two types of vaccine are used throughout the world to combat polio. 
what is polio? It is an infectious disease caused by the poliovirus. what are its symptoms? Sore throat, nausea, vomiting, abdominal pain, constipation and fever. can it be treated? There is no cure for polio. The focus of modern treatment has been on providing relief of symptoms, speeding recovery and preventing complications. where does the disease get its name from? Poliomyelitis.
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Polio [SEP] Vaccine
Two types of vaccine are used throughout the world to combat polio. Both types induce immunity to polio, efficiently blocking person-to-person transmission of wild poliovirus, thereby protecting both individual vaccine recipients and the wider community (so-called herd immunity). The first candidate polio vaccine, based on one serotype of a live but attenuated (weakened) virus, was developed by the virologist Hilary Koprowski. Koprowski's prototype vaccine was given to an eight-year-old boy on 27 February 1950. Koprowski continued to work on the vaccine throughout the 1950s, leading to large-scale trials in the then Belgian Congo and the vaccination of seven million children in Poland against serotypes PV1 and PV3 between 1958 and 1960.