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New Coronavirus Variants Complicate the Battle Against the Pandemic – The Wall Street Journal

Mutations may delay a return to normal as faster-spreading strains could make people sicker or render vaccines less effective

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The emergence of new variants of the virus that causes Covid-19including one in the U.K. that British officials say could be more deadly than earlier versionssignals a future in which health authorities are locked in a cat-and-mouse battle with a shape-shifting pathogen.
Faster-spreading coronavirus strains that researchers fear could also make people sicker or render vaccines less effective threaten to extend lockdowns and lead to more hospitalizations and deaths, epidemiologists caution. But,…

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