Explainer: Why has polio been found in London, New York and Jerusalem, and how dangerous is it? - Reuters.com

Polio, a deadly disease that used to paralyze tens of thousands of children every year, is spreading in London, New York and Jerusalem for the first time in decades, spurring catch-up vaccination campaigns. <a href="/world/us/polio-virus-found-new-york-city-w…

LONDON, Aug 15 (Reuters) - Polio, a deadly disease that used to paralyze tens of thousands of children every year, is spreading in London, New York and Jerusalem for the first time in decades, spurri… [+3178 chars]

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