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How the United States beat the variants, for now


Carl Zimmer and Apoorva Mandavilli, The New York Times
Published: 16 May 2021 05:12 PM BdST
Updated: 16 May 2021 05:12 PM BdST
Coronavirus test samples are loaded into a workstation in a lab at Duke University in Durham, NC, Feb 3, 2021. The country has managed to avoid a variant-fuelled spike in coronavirus cases. The New York Times
On Dec 29, a National Guardsman in Colorado became the first known case in the United States of a contagious new variant of the coronavirus.
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The news was unsettling. The variant, called B.1.1.7, had roiled Britain, was beginning to surge in Europe and threatened to do the same in the United States. And although scientists did not know it yet, other mutants were also cropping up around the country. They included variants that had devastated South Africa and Brazil and that seemed to be able to sidestep the immune system, as well as others homegrown in California ....

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How the United States Beat the Coronavirus Variants, for Now


In fact, B.1.1.7 seems to have the edge over nearly every variant identified so far. At a congressional hearing on Tuesday, Dr. Rochelle P. Walensky, the director of the Centers for Disease Control and Prevention, said B.1.1.7 made up 72 percent of cases in the country.
“We’re really seeing B.1.1.7 pushing out other variants decisively,” said Emma Hodcroft, an epidemiologist at the University of Bern.
The variants identified in California and New York turned out to be only moderately more contagious than older versions of the virus, and much of their initial success may have been luck. The overall boom in cases last fall amplified what might otherwise have gone undetected. ....

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