Poliomyelitis, also known as polio or infantile paralysis, is a vaccine-preventable systemic viral infection. Historically, it has been a major cause of mortality, acute paralysis and lifelong disabilities but large scale immunisation programmes have eliminated polio from most areas of the world. The disease is now confined to a few endemic areas and global eradication of the wild polio virus (WPV) is being attempted. The last WPV infection in Europe was in 1998, and the World Health Organisation declared the European Region polio-free since 2002. This interactive map shows the countries that still have remaining cases of WPV, and also those with cases of circulating vaccine-derived polio virus (cVDPV).