Detection of imported wild poliovirus in environmental samples 21 June 2014

Upon detection of wild poliovirus type 1 (WPV1) in environmental samples from Brazil, the Pan American Health Organization (PAHO) / World Health Organization (WHO) recommends that Member States of the Region of the Americas continue to strengthen surveillance for cases of acute flaccid paralysis in order to rapidly detect any new instances of imported poliovirus and maintain high immunization coverage against polio.