Proof that slowing inbound travel from CHINA was not a significant factor

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AHE
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Proof that slowing inbound travel from CHINA was not a significant factor

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We show that 80% of our sequences descend from strains that were initially circulating
widely in Europe but have since dominated the outbreak in the United States.
https://mbio.asm.org/content/mbio/11/5/ ... 0.full.pdf
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Re: Proof that slowing inbound travel from CHINA was not a significant factor

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Such a high proportion of our patients having all 4 variation indicates the seeding of our population by a strain originating in Europe. This finding is further validated in our local phylogenetic tree, which separates into 2 main clusters, our global tree in which our population closely resembles SARS-CoV-2 genomes from New York,9 followed by a smaller percentage from Washington state, together identifying possible routes for the dissemination of SARS-CoV-2 into the Southern California populace.

However, despite our earlier estimates, an even larger portion of our sample population had a significant resemblance to genomes from New York, the epicenter of the SARS-CoV-2 outbreak in the US.9,12,44 The appearance of the majority of our samples within different subclades of New York isolates suggests that SARS-CoV-2 likely spread from multiple introductions from New York.
https://jamanetwork.com/journals/jamane ... le/2771401
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