MMWR Morb Mortal Wkly Rep. 2021 Mar 12;70(10):348-349. doi: 10.15585/mmwr.mm7010e2.
In December 2020, the B.1.1.7 genetic variant of SARS-CoV-2, the virus that causes COVID-19, was first reported after emergence and rapid circulation in the United Kingdom (1). Evidence suggests that the B.1.1.7 variant is more efficiently transmitted than are other SARS-CoV-2 variants, and widespread circulation could thereby increase SARS-CoV-2 infection and hospitalization rates (1,2). The first reported SARS-CoV-2 B.1.1.7 variant case in the United States was confirmed by sequencing in Colorado on December 29, 2020.* This report describes a person who traveled from the United Kingdom to the United States after experiencing COVID-19-compatible symptoms and was eventually confirmed to be infected with the B.1.1.7 variant.
2020 年 12 月，导致 COVID-19 的 SARS-CoV-2 病毒的 B.1.1.7 基因变异首次在英国出现并迅速传播后被报告（1）。有证据表明，B.1.1.7 变异株比其他 SARS-CoV-2 变异株传播效率更高，因此广泛传播可能会增加 SARS-CoV-2 感染和住院率（1,2）。美国首例报告的 SARS-CoV-2 B.1.1.7 变异株病例于 2020 年 12 月 29 日在科罗拉多州通过测序确认*。本报告描述了一名在经历 COVID-19 症状后从英国前往美国的旅行者，最终被确认感染了 B.1.1.7 变异株。
