Polio: Updated Charts

Last Update: 26 June 2014 [Charts]
Next Update: 26 July 2014
2014_bar_7.11polio_bycountry_7.11wildtype_bycountry_7.11wildtype_7.112014_pie_7.11Note: The proportion of confirmed wild-type polio cases in years 1996 through 2000 is significantly less than what we’ve seen since. This difference is most likely due to changes in disease reporting that took place at the turn of the century.

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