Reported cases of paralytic polio from wild polioviruses, 2001 to 2021

This includes reported cases of paralytic polio from any wild poliovirus strain (WPV1, WPV2, WPV3).

20012021200520102015PakistanNigeriaMalawiIndiaAfghanistan

Source: World Health Organization

Note: The last case of WPV2 was reported in 1999, while the last case of WPV3 was reported in 2013. Cases shown since 2013 were all caused by WPV1.