Fever, abdominal pain and stiff neck – a 20-year-old man in the US state of New York fell ill with these symptoms in June. A few days later he had trouble moving his legs. The diagnosis: polio. He wasn't vaccinated.

In Ukraine, poliomyelitis paralyzed at least two people last year. Israel reported eight cases in children in the spring. In London, the virus circulates in the sewage. Wasn't polio history, long gone?

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