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CDC warns new Covid-19 variants could accelerate spread in US

Published Jan 18 2021 at 10:11 PM GMT
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  • CNN's Erica Hill reports on confusion around the amount of second doses of the coronavirus vaccine from Pfizer as the CDC warns the new Covid-19 variants could accelerate the spread of Covid-19 in the US.
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  • Published Jan 18, 2021 10:11 PM GMT