Polio Risk On the Rise
Author(s): James P. Denk, MA
Polio Eradication Progress, 1988-2014
Since 1988, there has been immense progress in eradicating polio worldwide. As of 2014, only three nations that never have eliminated polio.
- Centers for Disease Control and Prevention. May 1, 2014. Our Progress Against Polio. Accessed online, May 6, 2014. http://www.cdc.gov/polio/progress/index.htm
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