最新研究表明，在英国发现的新冠病毒变异株或将在3月成为在美国传播的新冠病毒主流。美国专家称，尽管美国新冠肺炎确诊病例数在近期有所下降，但由于变异新冠病毒的蔓延，美国疫情仍不乐观，民众不可放松警惕。

 

The coronavirus variant¹ that has moved through the UK is now spreading "rapidly" through the US, according to a new study published on Sunday.

根据2月7日发表的一项新研究，已经在英国传播的变异新冠病毒正在美国“迅速”传播。

 

The more contagious² strain is nearly doubling its prevalence among confirmed cases in the US every nine days.

变异新冠病毒在美国的传播率每隔9天就增长近1倍。

 

The spread of the variant, known as B.1.1.7, has put added pressure on vaccination³ efforts worldwide.

这种被称为B.1.1.7的变异新冠病毒的传播给全世界的疫苗接种工作增加了压力。

 

The US Centers for Disease Control and Prevention (CDC) has predicted it could be the predominant strain by March.

美国疾病控制与预防中心预测，这种变异新冠病毒或将在3月成为在美国传播的新冠病毒的主流。

 

The report, posted on the preprint server MedRxiv, is a collaboration⁵ of several researchers and scientists. It has not yet been peer-reviewed or published in a journal.

这份发布在预印本平台MedRxiv上的报告是几位研究人员和科学家的合作成果，尚未经过同行评审或发表在期刊上。

 

Case numbers of the new variant are still somewhat small in the US.

在美国，这种变异新冠病毒的病例数仍然很少。

 

According to the CDC, Florida leads the country in reported cases of B.1.1.7 with 187 as of Thursday, followed by California with 145.

根据美国疾病控制与预防中心的数据，截至2月4日，佛罗里达州报告的B.1.1.7型变异病毒确诊病例为187例，居全美之首，其次是加利福尼亚州，为145例。

 

"Our study shows that the US is on a similar trajectory⁶ as other countries where B.1.1.7 rapidly became the dominant⁴ SARS-CoV-2 variant, requiring immediate⁷ and decisive action to minimize Covid-19 morbidity⁸ and mortality," the report's authors wrote.

该报告的作者写道：“我们的研究表明，美国正处于与其他国家类似的轨迹上，B.1.1.7迅速成为新冠病毒的主要变种，需要立即和果断地采取行动，尽可能地降低其发病率和死亡率。”

 

This new strain is 35-45% more transmissible than other strains of the virus currently in the US, the report found.

报告发现，这种变异病毒的传染性比目前美国的其他毒株高35-45%。

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