Progress toward poliomyelitis eradication--Pakistan and Afghanistan, January 2005-May 2006.

As of March 2006, wild poliovirus (WPV) remained indigenous in four countries: Afghanistan, India, Nigeria, and Pakistan. Since 2005, WPV-endemic countries in Asia have intensified their polio eradication measures through use of type 1 monovalent oral polio vaccine (mOPV1) and implementation of innovative social mobilization, communication, and vaccine-delivery strategies. This report describes polio eradication strategies in Afghanistan and Pakistan during January 2005-May 2006.