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Tal Korem

@tkorem

Microbiome, metagenomics, ML, and reproductive health. All views are mine. So are all your base

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04.08.2023
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Latest posts by Tal Korem @tkorem

The truly visionary thing for Simons to do would be to map the collaboration graph of submitted proposals, find the bridges between large connected components, and offer them unrestricted awards

03.02.2026 09:07 πŸ‘ 22 πŸ” 2 πŸ’¬ 0 πŸ“Œ 2
Schopenhauer

Schopenhauer

11.01.2026 01:11 πŸ‘ 221 πŸ” 29 πŸ’¬ 5 πŸ“Œ 1

Pollution dropping by that much likely means a whole bunch of people are alive who otherwise wouldn’t be. Incredible stuff.

23.12.2025 22:00 πŸ‘ 105 πŸ” 20 πŸ’¬ 1 πŸ“Œ 0
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We just published in @molsystbiol.org with the Mugler lab (UPitt) on bacterial population dynamics during tumor colonization (mouse model). Our study was guided by a Luria–DelbrΓΌck-style idea: infer mechanism from statistics (1/7) πŸ§ͺ🦠
doi.org/10.1038/s443...

17.12.2025 18:52 πŸ‘ 18 πŸ” 12 πŸ’¬ 2 πŸ“Œ 0

Out after peer-review: www.science.org/doi/full/10....

Our bottom line stayed: never use leave-one-out cross-validation as it has inherent train-test leakage. Consider our Rebalanced version instead!

We now also account for regression and nested cross-validation, with more extensive benchmarking.

28.11.2025 19:31 πŸ‘ 39 πŸ” 12 πŸ’¬ 0 πŸ“Œ 1

Using leave-one-out cross-validation to calculate metrics such as AUC and R^2 creates bias! This can be fixed by removing one of each class in the meanwhile to maintain the training data distribution - great work by Tal and his team πŸ§ͺ🧬πŸ–₯️

29.11.2025 13:04 πŸ‘ 11 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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I found a flowchart which helps you navigate the IT landscape

01.10.2025 18:22 πŸ‘ 10565 πŸ” 3744 πŸ’¬ 53 πŸ“Œ 65

Back when we hid beer in the cold room in a box labeled β€œyeast embryos.”

29.11.2025 00:07 πŸ‘ 14 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

Out after peer-review: www.science.org/doi/full/10....

Our bottom line stayed: never use leave-one-out cross-validation as it has inherent train-test leakage. Consider our Rebalanced version instead!

We now also account for regression and nested cross-validation, with more extensive benchmarking.

28.11.2025 19:31 πŸ‘ 39 πŸ” 12 πŸ’¬ 0 πŸ“Œ 1

As long as three reviewers keep reading each proposal, doesn't really address anything either

13.11.2025 23:23 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

"This could take down Democrats, too."

I know. And I frankly wouldn't give even an itty bitty damn if it implicated every Democratic man in Congress, every Democratic hopeful for 2028 and every Democrat who has even thought about running for office.

Down with the sex predators, wherever they are.

13.11.2025 01:15 πŸ‘ 8675 πŸ” 1790 πŸ’¬ 215 πŸ“Œ 289

White paper: github.com/aqlaboratory...
GitHub Repo: github.com/aqlaboratory...
Huggingface: huggingface.co/OpenFold/Ope...
Testimonials: openfold.ghost.io/openfold3-co...

28.10.2025 18:30 πŸ‘ 9 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

OpenFold3-preview (OF3p) is out: a sneak peek of our AF3-based structure prediction model. Our aim for OF3 is full AF3-parity for every modality. We now believe we have a clear path towards this goal and are releasing OF3p to enable building in the OF3 ecosystem. MoreπŸ‘‡

28.10.2025 18:30 πŸ‘ 126 πŸ” 42 πŸ’¬ 1 πŸ“Œ 3

Just to be super clear, if you’re phoning in your peer review to ai you should quit your job so someone else who actually likes science can have it.

16.10.2025 23:37 πŸ‘ 370 πŸ” 67 πŸ’¬ 6 πŸ“Œ 2

No idea. Still working through this.

19.09.2025 03:06 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

This is from the very paper you linked to - Figure S5. They claim that this has a p-value of 1. It's not here and there, this is what most results look like, and this is a large part of the basis for claiming that there are no robust associations with other tumors.

19.09.2025 03:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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So you look at this figure and your interpretation is "no signal"?

18.09.2025 23:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I never knew I needed this thread

16.08.2025 02:48 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Korem Lab - Microbiome Systems Biology @ Columbia | New York, USA We apply systems biology approaches to decipher the metabolic interactions between the microbiome and its human host in diverse clinical settings, aiming towardsΒ personalized microbiome-based therapeu...

We are hiring a postdoc - come work with us (www.koremlab.science) at the intersection of #microbiome, data science, and women's health!
Message or email me if interested. πŸ–₯️ 🧬

07.08.2025 13:41 πŸ‘ 16 πŸ” 10 πŸ’¬ 0 πŸ“Œ 1
Garud Lab

I am seeking a postdoc for my group at UCLA. We work at the intersection of population genetics x microbiome (garud.eeb.ucla.edu). If interested, please message me!

22.07.2025 17:51 πŸ‘ 84 πŸ” 99 πŸ’¬ 1 πŸ“Œ 4

This will also likely reduce the number of study sections, firing SROs and making them less specialized.

17.07.2025 21:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Guidelines for preventing and reporting contamination in low-biomass microbiome studies Nature Microbiology - In this Consensus Statement, the authors outline strategies for processing, analysing and interpreting low-biomass microbiome samples, and provide recommendations to minimize...

Hope this is useful - consensus statement "Guidelines for preventing and reporting contamination in low-biomass microbiome studies" rdcu.be/er3Io

21.06.2025 19:59 πŸ‘ 106 πŸ” 48 πŸ’¬ 2 πŸ“Œ 2
The trolley problem graphic where one side is several people tied to the train tracks except the other side has no one on the tracks. A man is standing holding a lever trying to decide which track the trolley should take. The text reads β€œYou can pull the lever, but to do so you must wear a mask at the grocery store.”

The trolley problem graphic where one side is several people tied to the train tracks except the other side has no one on the tracks. A man is standing holding a lever trying to decide which track the trolley should take. The text reads β€œYou can pull the lever, but to do so you must wear a mask at the grocery store.”

25.05.2025 20:55 πŸ‘ 1483 πŸ” 433 πŸ’¬ 7 πŸ“Œ 13
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Not getting much attention, except in a recent NYTimes story, is a provision to increase the tax on university endowments and those of other nonprofits.

22.05.2025 10:22 πŸ‘ 735 πŸ” 372 πŸ’¬ 27 πŸ“Œ 33
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Incorporating scale uncertainty in microbiome and gene expression analysis as an extension of normalization - Genome Biology Statistical normalizations are used in differential analyses to address sample-to-sample variation in sequencing depth. Yet normalizations make strong, implicit assumptions about the scale of biologic...

New paper in Genome Biology!

genomebiology.biomedcentral.com/articles/10....

We introduce scale models, a generalization of normalizations that explciitly account for uncertainty in biological system scale (e.g., microbial load).

22.05.2025 16:43 πŸ‘ 8 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0

as a resident of syracuse, ny, a rust belt town that used to be an economic epicenter for the nation: syracuse university is our largest local employer now and if it goes under, so does my town, which has the largest concentration of child poverty in the nation.

18.05.2025 14:16 πŸ‘ 418 πŸ” 97 πŸ’¬ 4 πŸ“Œ 0
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Antibiotic research at Harvard lab threatened by federal funding cuts Microbiologist Michael Baym studies antibiotic resistance at Harvard Medical School. He lost millions in federal funding this week.

"I'm still in shock. I know that there have been political issues around Harvard in recent weeks, but antibiotic resistance isn't one of them." My conversation with Harvard microbiologist @baym.lol, one of many researchers there who just lost millions in fed. grants. www.wbur.org/news/2025/05...

16.05.2025 22:59 πŸ‘ 428 πŸ” 243 πŸ’¬ 11 πŸ“Œ 19

Our paper explaining why Gihawi et al. failed to prove an error in the normalization used by the 2020 cancer #microbiome analysis now out as a Matters Arising in @asm.org #mSystems (w/ @george-austin.bsky.social) πŸ–₯️ 🧬

Thread explaining the key points below.

journals.asm.org/doi/10.1128/...

02.05.2025 13:59 πŸ‘ 8 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Our paper explaining why Gihawi et al. failed to prove an error in the normalization used by the 2020 cancer #microbiome analysis now out as a Matters Arising in @asm.org #mSystems (w/ @george-austin.bsky.social) πŸ–₯️ 🧬

Thread explaining the key points below.

journals.asm.org/doi/10.1128/...

02.05.2025 13:59 πŸ‘ 8 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Come and work with me!

The Nature Micro team is expanding and we're looking for someone to champion microbial ecology, plant micro & related areas for the journal

Knowledge of microbial ecology/plant micro is desirable but we're open to applications from all microbiologists

Link below πŸ‘‡

11.04.2025 16:14 πŸ‘ 100 πŸ” 99 πŸ’¬ 1 πŸ“Œ 1