Vaccines

Ukraine outbreak brings polio back to Europe, WHO says

Two children in southwestern Ukraine have been paralyzed by polio, the first outbreak of the disease in Europe since 2010, the World Health Organization said on Wednesday, in a setback for a global eradication campaign.

The outbreak occurred because only half of Ukrainian children are immunized against polio, and the risk of further spread within the country is high, although the risks for nearby Romania, Poland, Hungary and Slovakia is low, a WHO statement said.