POVERTY: The Global Polio Eradication Initiative

The Global Polio Eradication Initiative (GPEI) was launched in 1988 and, as of March 2012, indigenous wild poliovirus (WPV) transmission has been interrupted in all countries except Afghanistan, Pakistan and Nigeria. However, outbreaks resulting from importation of WPV occurred during 2003–2011 in 29 previously polio-free African countries. Most of these outbreaks were contained, but WPV transmission became re-established (i.e. lasted >12 months) in Angola, Chad, the Democratic Republic of the Congo (DRC), and in Sudan. Sudan reported the last confirmed case in 2009.4 This report summarizes progress towards polio eradication in Africa during 2011.
http://www.who.int/wer/2012/wer8712.pdf