Dr Emma Hodcroft Profile picture
May 23, 2022 12 tweets 11 min read Read on X
This morning's session at the #Nobel Symposium starts with Michael Farzan explaining ACE2 binding in #SARSCoV2 & #SARSCoV1, including a great timeline comparison between how long steps took between the two (much faster in SC2) & asking if we can improve vaccines.
@MichaelWorobey follows, speaking to the importance of digging into the evidence of #SARSCoV2 outbreak sources & Hunan market.
He opens with a remark about how this beautiful location with so many great people to talk to is pretty close to heaven - he's not wrong!
Hyeryun Choe closes the first session with a great talk on how #SARSCoV2 adapted to humans, and the importance of the D615G mutation, to stabilizing the protein. With a great graphic reminder of how quickly G614 dominated.
Eric Snijder opens the second session with the reminder that "there are more proteins that are exciting than just Spike!" He points out that comparing similarities and differences across larger families can be very informative - and tells us about double membrane vesicles.
Last before lunch is @unibern's own @ProfVolkerThiel! Giving a fantastic overview of how to reconstruct #SARSCoV2 viruses, including VoC, and using them in human cell & animal models to evaluate differences. And another great visualisation of the advantage of G614.
No chance of falling asleep after lunch as @McLellan_Lab takes us through a fantastic talk on stabilizing prefusion spike proteins for vaccine development - critical for our current SC2 vaccines! And some exciting hints in the search for a universal beta-coronavirus vaccine.
And before coffee, @GuptaR_lab takes us through some great examples of discerning the impact of mutations in #SARSCoV2 VoCs - including careful inspection of the differences between Delta & Omicron in cell entry.
To close out the invited speakers today, @Tuliodna gives a brilliant talk on how South Africa managed in the pandemic & what was key: previous epidemic experience, holistic collaboration, communication with govt, being resilient, & giving back to the scientific community!
PhD student @robert_dyrdak outlines detection of mixed #SARSCoV2 BA.1 & BA.2 infections, and occasional misclassification of them as BA.3
Getting us going this morning at the #Nobel symposium is @florian_krammer excellently walking us through immune responses after #SARSCoV2 immunization & infection, including the impact of boosters & interesting observations on binding, non-neutralising antibodies!
@PennyMo70026063 battles disappearing p-values in uncooperative slides but delivers a great overview of the differences in immune profiles by vaccination & variant infection, & reminds us of the unique position of South Africa both in #SC2 history & due to people living with HIV
Fallen behind in tweeting, but Lindsey Baden gives an excellent overview of the challenges of the vaccine, including the importance of community inclusion, building public trust, & science communication. But he started with his takeaway: "The vaccine works."

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More from @firefoxx66

Sep 7, 2023
I'm excited to announce a new paper with @MLReichmuth and @C_Althaus, out now in @PLOSPathogens!

We used phylogenetics & modelling to investigate the introduction & expansion of #SARSCoV2 Alpha & Delta variants into #Switzerland & to simulate different interventions.

1/17 Image
First, we wanted to estimate the number of times Alpha & Delta were introduced into Switzerland before they were dominant.
For this we used sequences: we looked for where Swiss Alpha/Delta seqs descend from non-Swiss sequences - coming to Switzerland from elsewhere.

2/17
We looked at two ways of counting these introductions:

Liberal: every Swiss sequence coming from non-Swiss sequences is an introduction
Conservative: only the first Swiss sequence in a subtree of mixed-Swiss-non-Swiss sequences is an introduction

3/17 Image
Read 17 tweets
Jun 15, 2023
Benevolent dictators have no place in academic science.

I don't care if they usually make the right decision. Or if people don't think they've abused their power yet.

Science should not depend on one person being well-behaved.
Balance should be built in, power distributed.

1/5
"If you want to go fast, go alone, if you want to go far, go together" the African proverb says.

Can driven, visionary people start up groundbreaking ideas & cut through barriers to implement them? Absolutely! This 100% is part of science.

2/5
But if you want your idea to be a keystone of science communities & the public, you have to make it about more than *you*.

If you want to run a private business, go do that.
If you want to be keystone of public science, you have to be transparent, trustworthy, & stable.

3/5
Read 5 tweets
Apr 28, 2023
🎉CoVariants.org Update!🎉

23B (XBB.1.16) is now available on CoVariants! It's visible as part of Per Country & Per Variant plots, on the shared mutation page - and of course, has a page of its own.

1/10

#XBB116 #23B #Arcturus
📷 Image
This is in line with the recent addition of 23B (XBB.1.16) as a @nextstrain clade - read more on that below 👇🏻!

2/10

As I covered earlier, 23B (XBB.1.16) is descended from the recombinant 22F (XBB) variant, with some additional mutations. You can read more about how it evolved & acquired those mutations below 👇🏻.

3/10

Read 10 tweets
Apr 20, 2023
A Q I've seen: "How did this stay quiet so long?"

Quote from the article:
"Many sources who spoke to Science declined to be named out of fear of legal action from Bogner or of losing GISAID access."

Scientists depend on GISAID access. Fear is powerful.

science.org/content/articl…
Also from this article:
'Marion Koopmans ... says she has received multiple calls from Bogner“with a rather intimidating tone.” So have colleagues, she adds. “I have heard similar experiences from quite a few.”'
And:
"And Science heard many stories about researchers who saw their data curtailed, or cut off, without explanation. Some linked the actions to their being critical of GISAID or being seen as a potential threat."
Read 8 tweets
Apr 4, 2023
If you're an early career researcher (yes even 'just' a PhD student!) 1 of my biggest pieces of advice would be:
Go claim/create your Google Scholar page!! 👈🏻✍️🏻

I put this off bc I thought I 'didn't have enough on it'. I also generally thought "nobody is looking for me".

1/4
Now that I'm (a little) on the other end, I see how wrong I was.

It's *just fine* to not have "much" in your Google Scholar profile - anyone worth their salt will be evaluating you relative to your career state.
Much more important: to be findable!

2/4
And alongside that: it's so useful to have an easy way for people to see what your field is & what you've been up to/who you work with/your expertise.

Google Scholar is also pretty easy to maintain (will vary depending on how unique your name is), as it auto-updates.

3/4
Read 6 tweets
Feb 14, 2023
🎉 CoVariants.org Update! 🎉

23A (XBB.1.5) is now available on CoVariants! It's visible as part of Per Country & Per Variant plots, on the shared mutation page - and of course, has a page of its own.

1/9

#XBB15 #23A Image
This is in line with the recent addition of 23A (XBB.1.5) as a @nextstrain clade - read more on that below 👇🏻!

2/9

As I covered earlier, 23A (XBB.1.5) is descended from the recombinant 22F (XBB) variant, with some additional mutations. You can read more about how it evolved & acquired those mutations below 👇🏻.

3/9

Read 10 tweets

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