The coronavirus variants: What you need to know

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New variants of the coronavirus circulating globally appear to increase transmission and are being closely monitored by scientists. Driving the news: The...
New variants of the coronavirus circulating globally appear to increase transmission and are being closely monitored by scientists.

Driving the news: The highly contagious variant B.1.1.7 originally detected in the U.K. could become the dominant strain in the U.S. by March if no measures are taken to control the spread of the virus, the Centers for Disease Control and Prevention said Friday.

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Why it matters: Countries are being overwhelmed by surges in cases that have led to border closures, quarantines and more aggressive pushes for the public to get vaccinated. So far, the variants do not appear to be resistant to the existing vaccines or cause more severe disease.

The state of play: Public officials are tracking SARS-CoV-2 variants, including the B.1.1.7 variant detected in the U.K., the 501.V2 variant in South Africa and a newly discovered variant in Brazil.

The B.1.1.7 variant has been identified in about 45 countries, but nations without routine genetic surveillance, including the U.S., may not fully know the extent of the spread, sparking calls for increased…
Marisa Fernandez
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