渥太华发现首例英国变异病毒
- 主题发起人 寻找尼莫
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2 hr 20 min ago
A new variant of coronavirus first spotted in Britain has been imported to the US multiple times, and was apparently already circulating before it was even identified in the UK, researchers reported late Monday.
Biologist Michael Worobey of the University of Arizona said he's found evidence that the variant, also known as B.1.1.7, was imported at least five separate times to the US, and likely many more.
It is striking that this lineage may already have been established in the US for some 5-6 weeks before B.1.1.7 was first identified as a variant of concern in the UK in mid-December," he wrote in a post on a website dedicated to sharing genetic information about the virus.
"And it may have been circulating in the US for close to two months before it was first detected, on 29 December 2020."
Worobey also found evidence B.1.1.7 circulated in California without seeming to drive more transmission -- even though scientists widely agree the variant is more easily transmitted, and even though the US Centers for Disease Control and Prevention warned last week it was likely to “increase the virus trajectory” in the United States.
“It is also worth noting the vast majority (more than 90%) of US B.1.1.7 cases appear to be generated in these well-established domestic outbreaks rather than via travel-related introductions from the UK or other affected countries, though such cases are surely also happening.”
The CDC says it’s had reports of more than 120 cases of the new variant in 20 US states, and says it’s almost certainly far more common than that.
New virus variant may have been circulating in the US before it was identified in UK, researchers say
From CNN’s Maggie FoxA new variant of coronavirus first spotted in Britain has been imported to the US multiple times, and was apparently already circulating before it was even identified in the UK, researchers reported late Monday.
Biologist Michael Worobey of the University of Arizona said he's found evidence that the variant, also known as B.1.1.7, was imported at least five separate times to the US, and likely many more.
It is striking that this lineage may already have been established in the US for some 5-6 weeks before B.1.1.7 was first identified as a variant of concern in the UK in mid-December," he wrote in a post on a website dedicated to sharing genetic information about the virus.
"And it may have been circulating in the US for close to two months before it was first detected, on 29 December 2020."
Worobey also found evidence B.1.1.7 circulated in California without seeming to drive more transmission -- even though scientists widely agree the variant is more easily transmitted, and even though the US Centers for Disease Control and Prevention warned last week it was likely to “increase the virus trajectory” in the United States.
“It is also worth noting the vast majority (more than 90%) of US B.1.1.7 cases appear to be generated in these well-established domestic outbreaks rather than via travel-related introductions from the UK or other affected countries, though such cases are surely also happening.”
The CDC says it’s had reports of more than 120 cases of the new variant in 20 US states, and says it’s almost certainly far more common than that.
美国真伟大！
