Following the<unk> myelitis eradication efforts, started by the GPEI (Global<unk>  Eradication Initiative) in 1988, the number of reported cases has fallen by over 99%, to the point that in 2015 only 74 cases were reported. In 2016 only 3 countries remain<unk> -endemic: Nigeria, Pakistan, and Afghanistan.  The incidence of<unk> myelitis is higher in children under 5 years of age, however, the death-to-case ratio for paralytic<unk> myelitis is higher among adults.  Incidence and prevalence of<unk> myelitis do not vary by gender.  The last case of wild-virus<unk> myelitis acquired in the United States was in 1979.  Of the 3 strains of wild<unk> virus worldwide, wild<unk> virus type 2 was eradicated in 1999, and case numbers of wild<unk> virus type 3 are down to the all-time lowest levels. The last reported case of type 3 was in Nigeria in November 2012.
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