Dr Emma Hodcroft Profile picture
Die Virenjägerin! 🏹🧬 Co-developer of @nextstrain! Using phylogenetics, I study viruses. I like ✈️ & 🐈 @firefoxx66@mstdn.science @firefoxx66.bsky.social

Feb 14, 2023, 10 tweets

🎉 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.

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#XBB15 #23A

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

On the 23A page, you can read about some initial 23A (XBB.1.5) work on neutralizing titres, see a list of defining mutations, a plot of the variant growth, link to Aquaria protein viz, & see a list of other mutations present in the variant.

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#XBB15

covariants.org/variants/23A.O…

There's also a link to the 23A (XBB.1.5) @nextstrain focal build:
nextstrain.org/groups/neherla…

Here, we can zoom in on the clade & get a closer look at how 23A sequences are distributed around the world, & their diversity. 🌏🌎

5/9

#XBB15

On the Per Country page, 23A (XBB.1.5) is already clearly visible in the USA, Canada, UK & Israel, & is starting to appear in smaller numbers in other countries, like Germany & Singapore. Remember, sequencing data is always a few weeks behind.

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covariants.org/per-country

Finally, on the Shared Mutations page, you can see how 23A's / XBB.1.5's Spike mutations compare to other VoC, including its Omicron family and 22F (XBB) parent.

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covariants.org/shared-mutatio…

More information on 23A (XBB.1.5) & its spread will become available in due course.

As always, CoVariants.org is open-source & we welcome your PRs & suggestions to add more studies & information to variant pages! (Or any error-catching!)

github.com/hodcroftlab/co…

8/9

As before, I've created a file for 23A (XBB.1.5) mapping all defining mutations (relative to ancestral), including nuc->AA. This is available on the CoVaritants Github!

Huge 🙏🏻to all who helped check it! (Esp @CorneliusRoemer @AngieSHinrichs)!

github.com/hodcroftlab/co…

9/9

Apologies - that last link to the defining mutations machine-readable file is going to 22F not 23A! Here's the right one: github.com/hodcroftlab/co…

And sorry for any confusion!

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