International risk of the new variant COVID-19 importations originating in the United Kingdom.


The new variant COVID-19 has likely been introduced by travelers from the UK and spreading undetected for months in many countries.

A fast-spreading SARS-CoV-2 variant identified in the United Kingdom in December 2020 has raised international alarm. We estimate that, in 16 out of 19 countries analyzed, there is at least a 50% chance the variant was imported by travelers from the United Kingdom byDecember 7th.

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