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**Poliovirus**

**"Poliomyelitis is a viral disease that can affect nerves and can lead to partial or full paralysis.** **Between 1840 and the 1950s, polio was a worldwide epidemic. Since the development of polio vaccines, the incidence ** ** of the disease has been greatly reduced. Polio has been wiped out in a number of countries. There have been very few cases of polio in the Western hemisphere since the late 1970s. Children in the United States are now routinely vaccinated against the disease (PubMedHealth)." **

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