The team at the @seattleflustudy have sequenced the genome the #COVID19 community case reported yesterday from Snohomish County, WA, and have posted the sequence publicly to http://gisaid.org . There are some enormous implications here. 1/9
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It's possible that this genetic similarity is a coincidence and these are separate introductions. However, I believe this is highly unlikely. The WA1 case had a variant at site 18060. This variant is only present in 2/59 viruses from China. 4/9pic.twitter.com/Rb9N5uvgwg
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I'd assess the p-value for this coincidence at 2/59=0.03 and so is statistically significant. Additionally, these two cases are geographically proximal, both residing in Snohomish County. 5/9
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I believe we're facing an already substantial outbreak in Washington State that was not detected until now due to narrow case definition requiring direct travel to China. 6/9
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We will be working closely with
@KCPubHealth and@WADeptHealth to investigate the full extent of the outbreak. 7/9Diesen Thread anzeigen -
We're hoping to update soon with better estimates of the number of infections in Washington State using available data. 8/9
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Thank you to the
@seattleflustudy team, and particularly to@lea_starita, for exceptionally fast turnaround from diagnostic assay at@WADeptHealth to sequenced genome. 9/9Diesen Thread anzeigen -
An update, because I see people overly speculating on total outbreak size. Our best current expectation is a few hundred current infections. Expect more analyses tomorrow.
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One more update: my best guess at a p-value here is 0.03 as above based on shared mutations (still possible this pattern was chance). If we get another sequence or two from additional WA community cases this should clinch the matter one way or another.
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And yet there’s been no reported uptick in serious respiratory illness in WA over the last 6 weeks, right? Wouldn’t that indicate that this virus, while easily spread, does *not* pose a serious public health risk? Is the media is hyping this out of proportion to its danger?
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Completely anecdotal, but over the past month or so, I've noticed more coworkers than usual calling in sick or working from home because they weren't feeling well.
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