CDC Says More Virulent British Strain Of Coronavirus Now Dominant In U.S.

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On Wednesday, pharmacists at the West Wales General Hospital in Carmarthen, Wales, transport a cool box containing the first batch of Moderna vaccines being distributed in Britain.

The variant known as B.1.1.7, which is more easily spread, was first identified in England last fall. Since then, it has spread quickly in the U.S.

(Image credit: Jacob King/AP)