Professor of Global Health Systems, Epidemiology and Evaluation, UCL Institute for Global Health. retweets ≠ endorsements. Views my own.

Joined May 2009
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I’m 43 today, and I reckon, starting in 2005 I’m about 43% through my career.. Please check out my inaugural for the story of the first 43%, and, from the 43rd minute, what I hope to do in the rest youtube.com/watch?v=jnUQemXW…
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Prof Tim Colbourn retweeted
Should sick kids with SpO2 90-93% also get medical #oxygen? Current @WHO says no, but what if they're wrong? New @BMJ_PO study opens door for trial 👉 bmjpaedsopen.bmj.com/content… 🙏@tinylungsglobal @CarinaTKing @timcolbourn @HopkinsMedicine @JohnsHopkinsSPH @StellenboschUni @TheUnion_TBLH
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People are relying on AI too much. When’s the backlash start? Who even wants products like Mythos anyway?
🦔A researcher invented a fake eye condition called bixonimania, uploaded two obviously fraudulent papers about it to an academic server, and watched major AI systems present it as real medicine within weeks. The fake papers thanked Starfleet Academy, cited funding from the Professor Sideshow Bob Foundation and the University of Fellowship of the Ring, and stated mid-paper that the entire thing was made up. Google's Gemini told users it was caused by blue light. Perplexity cited its prevalence at one in 90,000 people. ChatGPT advised users whether their symptoms matched. The fake research was then cited in a peer-reviewed journal that only retracted it after Nature contacted the publisher. My Take The researcher made the papers as obviously fake as possible on purpose. The AI systems didn't catch it. Neither did the human researchers who cited it in real journals, which means people are feeding AI-generated references into their work without reading what they're actually citing. I've covered the FDA using AI for drug review, the NYC hospital CEO ready to replace radiologists, and ChatGPT Health launching this year. All of that is happening in the same environment where a condition funded by a Simpsons character and endorsed by the crew of the Enterprise was being presented as emerging medical consensus. The people making these deployment decisions seem to believe the pipeline from research to AI to patient is more supervised than it actually is. This experiment suggests it isn't supervised much at all. Hedgie🤗 nature.com/articles/d41586-0…
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Is it the right call? Are they the same 16 people who are saying this?!: x.com/andrewcurran_/status/2… Next model needs an all clear from capable *independent* evaluation *before* release!

Replying to @peterwildeford
4/ How did they rule out the need for stronger safegaurds? You'd hope some rigorous evals. But instead it's a survey of 16 Anthropic employees. This is probably the right call, but it's much flimsier than I'd like. And it's not what Anthropic originally advertised.
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Yes Donald Trump was elected, but why is he, as one man, deciding the fate of US foreign policy? No one voted for upending the world order did they?
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Prof Tim Colbourn retweeted
Sorry I need to steal your house to stop someone else stealing it
Which way, Greenland man?
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Prof Tim Colbourn retweeted
** Exciting book news - publication 8th June 2026 ** Evaluating Public Health Interventions textbook uclpress.co.uk/book/evaluati… Will be open access, free download ⭐️20 chapters covering mixed methods impact, process & economic evaluation ⭐️100 figures ⭐️60 amazing authors
Looking forward to teaching my Evaluating Interventions module next week @UCLGlobalHealth Enjoying reading the new MRC-NIHR guidance on developing & evaluating complex interventions: bmj.com/content/bmj/374/bmj.… Great to see shift in focus - now v inline with our course content :)
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Prof Tim Colbourn retweeted
** NEW ** Thanzi La Mawa (TLM) data public release github.com/HEPUMW/TLM-data-r… ⭐️Cleaned & processed so no individual identifiable ⭐️Available for reuse for public health 🏥Data on healthcare worker productivity, patient experiences, facility resources, and care quality 1 of 2
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** NEW ** Thanzi La Mawa (TLM) data public release github.com/HEPUMW/TLM-data-r… ⭐️Cleaned & processed so no individual identifiable ⭐️Available for reuse for public health 🏥Data on healthcare worker productivity, patient experiences, facility resources, and care quality 1 of 2
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🏥From 30 health facilities sampled across Malawi, collected Jan-May 2024: ✅Facility audits ✅Patient exit interviews & follow-ups ✅Time and motion study @thanzilaonse @KuhesHepu 2 of 2
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Prof Tim Colbourn retweeted
Dr @CarinaTKing, a driving force behind the @LancetGH #Oxygen Commission, presenting findings & recs at @UnionConference in #Copenhagen👇 Learn more about her work👉 ki.se/en/people/carina-king @TheUnion_TBLH #WCLH2025 #InvestinOxygen #GO2AL
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Prof Tim Colbourn retweeted
1/ A document circulating online claims to be a new CDC “revision” about autism and vaccines. This thread reviews those statements and compares them with established evidence from major scientific bodies.
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Prof Tim Colbourn retweeted
This year’s chemistry laureate Omar Yaghi was born in Amman, Jordan, in 1965 to parents who were refugees from Palestine. When we spoke to him he shared his story: “I grew up in a very humble home, we were a dozen of us in one room, sharing it with the cattle that we used to raise. I was born in a family of refugees, and my parents could barely read or write. My father finished sixth grade and my mother couldn’t read or write. It’s quite a journey. Science allows you to do it. Science is the greatest equalising force in the world. Smart people, talented people, skilled people exist everywhere. That’s why we really should focus on unleashing their potential through providing them with opportunity.” Today Yaghi shared the 2025 Nobel Prize in Chemistry with Susumu Kitagawa and Richard Robson for their work developing metal–organic frameworks. Learn more about the prize: nobelprize.org/prizes/chemis…
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Prof Tim Colbourn retweeted
Launching the EAT-Lancet report today on Healthy, Safe and Just diets. A global science assessment giving key guidelines for transforming our world back within the safe operating space on Earth. Highlights? Save 15 million lives/yr, cut emissions with 50 % thelancet.com/journals/lance…
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Prof Tim Colbourn retweeted
Gaza and the collapse of public health: a call for action thelancet.com/journals/lance…
12 Sep 2025
Richard Horton's latest Offline: The unavoidable reckoning hubs.li/Q03J59HP0
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