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Why has polio been found in London, New York and Jerusalem, and how dangerous is it?

Vaccine-derived polio was detected in wastewater in the British capital, London, and in New York in the United States, with one case of paralysis reported in New York state. Why has polio been found in London, New York and Jerusalem, and how dangerous is it?
Big Ben and The London Eye are seen on a summer evening in London, Britain, June 15, 2022. Reuters
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Reuters
Published at : August 16, 2022
Updated at : August 16, 2022 10:21
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