The Eradication of Polio — Progress and Challenges

Abstract
Six years after the original 2000 target date for the global eradication of polio, public health workers are encountering several stumbling blocks. Poliovirus circulation persists in countries where the virus is endemic; new outbreaks are occurring in previously polio-free areas, including, most recently, Kenya's first documented wild-type poliovirus infection in 22 years; and complex social challenges stand in the way of public health efforts in some countries.

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