Assessing and mitigating the risks for polio outbreaks in polio-free countries — Africa, 2013–2014

Since 1988, when the Global Polio Eradication Initiative (GPEI)* began, the annual number of polio cases has decreased by >99% (1). Only three countries remain that have never interrupted wild poliovirus (WPV) transmission: Afghanistan, Nigeria, and Pakistan (1). Since 2001, outbreaks have occurred in 31 formerly polio-free counties in Africa, with outbreaks in 25 countries caused by WPV originating in Nigeria (2–4). After the declaration of the World Health Assembly of polio eradication as a programmatic emergency in 2012, efforts to identify areas at high risk for importation-associated outbreaks and to reduce that risk have been intensified (5). This report updates the 2013 assessment of the risk for outbreaks attributable to importation of poliovirus in 33 countries in Africa, using indicators of childhood susceptibility to poliovirus and proximity to countries currently affected by polio (6). From January 2013 to August 12, 2014, outbreaks occurred in five African countries. Four of the five (Cameroon,

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Added on: 16 June, 2016
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