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Global Wild Poliovirus Spread Trends Report

Comprehensive analysis of Wild Poliovirus type 1 and type 3 spread in endemic and previously affected countries over the last 12 and 6 months. Data from WHO Headquarters as of September 11, 2012.

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Global Wild Poliovirus Spread Trends Report

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  1. Wild Poliovirus1, Previous 12 Months* *12 Sep 2011 – 11 Sep 2012 Wild virus type 1 Wild virus type 3 Wild virus type 1/3 Endemic country Country with WPV case in previous 6 months Country with WPV case 6-12 months ago 1Excludes viruses detected from environmental surveillance and vaccine derived polioviruses. Data in WHO HQ as of 11 Sep 2012

  2. Wild Poliovirus1, Previous 6 Months* *12 Mar – 11 Sep 2012 Wild virus type 1 Wild virus type 3 Endemic country Country with WPV case in previous 6 months 1Excludes viruses detected from environmental surveillance and vaccine derived polioviruses. Data in WHO HQ as of 11 Sep 2012

  3. WHO • Margret Chan • Bruce Aylward

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