Surveillance systems to track progress toward polio eradication

This report presents poliovirus surveillance data from 2014 and 2015, focusing on the 20 countries in the African Region and six in the Eastern Mediterranean Region that reported a WPV or circulating VDPV (cVDPV) case during 2011–2015, including Guinea, Liberia, and Sierra Leone, which were most affected by the 2014–2015 Ebola virus disease (Ebola) outbreak.

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