'People should be worried' about coronavirus variants, expert says
Thanks to natural mutations, more-infectious and potentially deadlier variants of the virus that causes COVID-19 are now racing around the globe and are threatening to turn back the recent progress against the disease due to vaccination. Last week Houston became the first big American city to report the presence of all five variants that have medical experts worried — a California strain called B.1.427/B.1.429, a New York variant classified as B.1.526, the Brazilian P.1 strain, a strain called B.1.351 that is believed to have originated in ...
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