Dr. Angela Rasmussen Profile picture
Jun 4 20 tweets 5 min read Read on X
People asking why this is factually incorrect…I’m at a conference today so am pressed for time but I’ll quickly address each of the 5 “key points.”

Bottom line: You can dress up unsupported horseshit in as much polished data viz as you want, but it still stinks.
Yes the virus emerged in Wuhan & the WIV is there & studies SARS-related CoVs, but that’s where the truth ends.

Shi Zhengli’s lab does great work on SARSr-CoVs, but they aren’t the only lab in the world doing so. They aren’t even the only lab in China doing this work. Image
In fact, people all over the world have been studying these viruses—including those isolated from bats—since SARS1 emerged in 2002. In the US, Australia, Hong Kong, Singapore, the UK, the Netherlands, Japan, France, Canada, and so on.
Fun fact: early in 2020 I joined a WHO Expert Group on experimentally modeling SARS-CoV-2. Multiple folks from China were there, none of whom were from WIV or Wuhan. SARS-CoV-1 emerged in China, so many labs there study these viruses. Wuhan isn’t special & WIV is one of many.
This is a little confusing, since the “defining feature” isn’t actually defined by the author. But she means the furin cleavage site.

She also neglects to mention this proposed work was not funded (thus likely didn’t occur) & all the FCS insertion work was to occur in the US. Image
And could this work have been done despite the multimillion dollar grant intended to support it? Sure. Is there evidence that this work was carried out anyway?

None whatsoever.

Most people don’t apply for DARPA grants they don’t need if they already have millions lying around
Yes the WIV did SARSr-CoV work at BSL-2 (consistent with the BMBL, the US’s standards for bat SARSr-CoVs).

No, this isn’t appropriate for SARS-CoV-2.

However, there is zero evidence that WIV had SARS-CoV-2 or a progenitor in their collection.

No SARS2 at WIV, no lab leak. Image
That’s pretty simple. It doesn’t matter what containment level the WIV was using for other SARSr-CoVs because those viruses are not SARS-CoV-2, nor could these viruses ever become SARS-CoV-2.

The viruses that WIV was known to have are more closely related to SARS-CoV-1.
Even the most closely related SARSr-CoV (RaTG13) in WIV’s collection is different by more than 1100 mutations across its entire genome. No amount of insertions, mutagenesis, or passaging in cells, transgenic mice, bats, or whatever else can make it SARS-CoV-2.
I’m closely related to my sibling and my parents. If I got cancer or HIV (which would cause mutations/insertions/recombination of my genome), it would not turn me into my brother or my parents.

Similarly, the WIV’s SARSr-CoVs can’t turn into SARS-CoV-2 at any containment level.
This is just plain incorrect. The hypothesis was published with enough supporting evidence to pass a rigorous peer review and be published in Science. The papers have not been retracted. Image
And just because a small but outspoken group of people—primarily those without any relevant professional or domain expertise, including the author of the NYT piece—claim these papers are disputed, debunked, or aren’t “strong” evidence doesn’t make those claims true.
If anyone can provide a legitimate analysis or plausible alternative explanation for these multiple threads of evidence, then they should submit it for peer review by experts and publish it in a scientific journal.

So far no such paper has been produced.
Here’s a summary of the Worobey et al 2022 paper.

Critics have had 2 years to challenge these results scientifically, providing additional evidence or a compelling alternative interpretation of these data. These papers & their findings have not been substantively challenged.
Finally, no shit “key evidence” is still missing. The role of the market in the pandemic’s emergence was covered up in ways that didn’t apply to SARS1 or MERS. The market was closed. Live animals were removed. Clearly evidence was suppressed, not collected, or not made accessible Image
However, that doesn’t mean the evidence we DO have doesn’t support market origin. Existing affirmative evidence isn’t invalidated by a lack of other types of evidence.

Again, I have yet to see an alternative explanation for the multiple threads of evidence supporting zoonosis.
“No infected animals at the market” (because samples weren’t taken to look for said infected animals) doesn’t disprove all the other evidence that very clearly points to the market.
Evidence isn’t a carton of milk. It doesn’t expire if you don’t find it. Intermediate hosts of SARS1 and MERS were not found in days as claimed and sometimes they are never found. It took years to find the reservoir for Marburg virus. Nobody debates that it is zoonotic.
Supposedly this was fact-checked by @nytimes—not well enough.

This matters. Watch this clip of Dr. Fauci talking about the sickening threats made against him & his family.

Factually incorrect claims like those in this piece encourage these threats.
cnn.com/2024/06/03/pol…
It is grossly irresponsible to say that these 5 unsupported claims mean the pandemic “probably” started with a lab leak. They misrepresent the actual evidence and put people like Dr. Fauci at great risk.

The @nytopinion has shamed itself by printing untruths & outright lies.

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with Dr. Angela Rasmussen

Dr. Angela Rasmussen Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @angie_rasmussen

Nov 11
Thanks to the first Canada acquired H5N1 case, there’s an uptick in “bird flu pandemic imminent” and “omg it’s gone H2H!” posts. Those are not accurate.

However, given the situation in the US, I have some real concerns about this that grow progressively more grave.
First let’s get this out of the way: while a case has never occurred locally in Canada, there have been many human cases of H5N1 during this panzootic (since 2021).

It’s probably direct spillover from a bird or other animal, not human to human transmission.
But as we’ve seen in the US with dairy and poultry workers, spillover to humans will occur if there are opportunities for exposure. Right now in the US, there are many opportunities for exposure in both the dairy and poultry industries.
Read 23 tweets
Oct 24
Finally, we have H5N1 serology data from Missouri. 🙏🏻 @CDCgov.

Both the MO patient and their household contact were positive for antibodies against H5N1 in 1/3 tests. This is not definitive per WHO criteria (2 tests positive) but does suggest infection.

cnn.com/2024/10/24/hea…
Testing positive on just 1/3 tests may suggest that these patients had a transient infection. Weak seropositivity can indicate low titers of antibodies, consistent with an immune response to low levels of virus replication.
That’s good news. A more human-adapted virus would be more fit, replicating more efficiently, producing more virus, and increasing the chances of onward transmission.

This suggests that this virus isn’t very fit in a human host.
Read 6 tweets
Oct 20
When you move quickly to assess the origins of an outbreak, you can learn a lot about how it emerged just by analyzing the viral genomes.

In the case of the Marburg virus outbreak in Rwanda, it was a single zoonotic spillover from an unknown host.

Really excellent work here.
A question I have concerns the animal host. Was it R. aegyptiacus (known Marburg reservoir) or something else?

Because this “limited mutation rate” is interesting. Ebola (also a filovirus) appears to persist without replicating much as seen in outbreaks in survivors.
And if this “limited mutation rate” suggests few mutations compared to the 2014 virus (would have to actually see the data), it might indicate something similar is going on with Marburg too. Potentially in an animal host, since there haven’t been human cases in Rwanda before now.
Read 4 tweets
Oct 10
Have you ever wondered how Ebola virus manages to induce such a catastrophically lethal host response?

I have. So @mhamdi_zeineb & I joined Satoko Yamaoka & Hideki Ebihara to get some answers about mechanisms of pathogenesis.

SPOILER ALERT: it's VP40
biorxiv.org/content/10.110…
Ebola pathogenesis is brutal and super complex. When people hear Ebola hemorrhagic fever (now Ebola virus disease or EVD), they shouldn't think Ebola kills cells and causes bleeding. They should instead think Ebola causes a massive, uncontrolled systemic inflammatory response.
A brief description of Ebola pathogenesis:
1. Infect macrophages & DCs in peripheral tissue
2. Infected cells go to nearest lymph node
3. Repeat 1 + kill B & T cells. Viremia ensues
4. Dump proinflammatory cytokines into bloodstream & you get intravascular coagulation Image
Read 21 tweets
Oct 3
Every time there’s a Marburg or Ebola virus outbreak, my feed instantly fills with filovirus fear porn.

It’s airborne! Deadliest virus ever! OMG IT’S IN EUROPE! Pandemic imminent!

These takes are at best wrong & at worst anti-scientific and racist.

Here are some facts.


Image
Image
Image
Image
You may have heard two travelers, including a medical student who had contact with patients in Rwanda while wearing PPE, got sick on a train in Hamburg.

You may not have heard that they both tested negative for MARV but are staying in quarantine anyway.

ndr.de/nachrichten/ha…
The above is not only an indication that in fact MARV has not been imported to Germany, but even if it were, extensive spread is unlikely. Basic epidemiological control measures (isolation, quarantine) work well to contain filovirus outbreaks when they are applied rapidly.
Read 15 tweets
Sep 22
When competent scientists disagree with the conclusions of a peer-reviewed paper in a top-tier journal, they present evidence to show why it’s wrong.

When incompetent scientists have no evidence, they harass journal editors so severely that they abandon the public discussion.
Abuse is not acceptable and there should be consequences for academics who relentlessly target journal editors or other professionals for simply doing their jobs. Targeted harassment should never be excused because the harassers are unable to falsify a hypothesis they dislike.
This is an issue of scientific integrity, as well.

Bullying the handling editor of a paper you dislike into silence is a tactic to circumvent and undermine the peer-review process. It’s an attempt to delegitimize the journal and the scientific method.
Read 4 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

:(