Update: Polio this week – As of 1 May 2013
Global Polio Eradication Initiative
http://www.polioeradication.org/Dataandmonitoring/Poliothisweek.aspx

[Editor’s extract and bolded text]
– Multi-country immunization campaigns took place this week (26-29 April) across West Africa. Benin, Burkina Faso, Côte d’Ivoire, Guinea, Liberia, Mali and Sierra Leone all participated, aiming to reach nearly 30 million children under the age of five years with oral polio vaccine (OPV).
– The Horn of Africa TAG is meeting this week (30 April to 1 May) in Nairobi, Kenya, to review the status of polio eradication activities and impact in the region. Outbreak response is ongoing, to an ongoing circulating vaccine-derived poliovirus type 2 (cVDPV2) outbreak in south-central Somalia, which in 2012 had also spread across the border into Kenya.

Nigeria
Two new WPV cases were reported in the past week (WPV1s from Borno), bringing the total number of WPV cases for 2013 to 16. The most recent WPV case had onset of paralysis on 28 March (WPV1 from Borno).

Horn of Africa
Outbreak response is continuing in various parts of the Horn of Africa, in response to the ongoing cVDPV2 outbreak in south-central Somalia. Staggered SNIDs are being implemented in parts of Somalia throughout May.