Natalie Mayerhofer

Natalie Mayerhofer

@nmayerhofer.bsky.social

Founder, School of AI in Healthcare / École de l'IA en santé Deputy Chief Learning Officer, CHUM Une vraie Montrealer 🍁🥯. Bonjour 💙 Hi! Opinions are my own.

1,045 Followers 829 Following 67 Posts Joined Oct 2023
1 day ago
Preview
Defining Technologies of Our Time - Aspen Digital This handbook offers an accessible, easy to use entry point for grappling with the question of how to define AI in a legal context.

🤖 In policy? Thinking about the definition of "AI"?
Led by @aspendigital.bsky.social, a set of us at intersection of AI/ethics/law/policy put together this resource on the lineage of policy "AI" definitions, what they're getting right, what might be improved.
www.aspendigital.org/report/defin...

18 5 3 1
2 days ago
Preview
'AI Is African Intelligence': The Workers Who Train AI Are Fighting Back Kenyan workers are still the underpaid labor behind AI training, moderation, and sex chatbots. The Data Labelers Association is fighting back.

I met with AI data labelers in Kenya who are organizing their colleagues to fight the brutal working conditions and horrible pay given to the workers at the "bottom of the AI supply chain." They believe the NDAs they've signed are unenforceable so are speaking out:

www.404media.co/ai-is-africa...

6,047 2,911 31 155
1 week ago
Climate change in the WHO Pandemic Agreement negotiations: a qualitative study. Graph shows the evolution of different topics over different articles.

NEW PREPRINT! 🦠⚖️🌡️ The Pandemic Agreement is the first global health treaty to name climate change, and behind the scenes, the UNFCCC was a source of both inspiration and conflict. Cristina Arnés-Sanz and team tracked climate issues through three years of negotiations: papers.ssrn.com/sol3/papers....

39 19 1 3
2 days ago
Preview
A.I. Chatbots Want Your Health Records. Tread Carefully. Following rivals like Amazon and OpenAI, Microsoft is upgrading its artificially intelligent assistant to track your health. There are benefits and risks to consider.

Big tech is moving into your medical records. Microsoft’s Copilot Health will soon merge Apple Watch data with clinical histories to "connect the dots" in seconds. It’s an efficiency win, but the privacy stakes are high: HIPAA doesn't apply here, and AI bias hasn't been solved yet.
#MedSky #MedAI

18 9 4 2
4 days ago
Preview
Removing race from kidney function algorithm helped more Black patients access transplants Removing race from the eGFR had a big impact, resulting in 5.3 more kidney transplants per 1000 Black candidates.

A long-used medical test underestimated the severity of kidney disease in Black patients. New study says with the bias removed, transplant rates are up. www.statnews.com/2026/03/10/k...

51 21 0 5
2 weeks ago
Preview
The "ChatGPT Health Will Kill You" Study LLMs can't triage, for the millionth time.

Don't trust ChatGPT Health – or likely any general health LLM – to give you medical advice in the context of a serious acute illness. Patient triage is clearly outside its functional requirements.
#medsky
www.evidencetriage.com/p/the-chatgp...

7 7 0 0
3 weeks ago
Preview
Paediatricians’ blood used to make new treatments for RSV and colds Antibodies harvested from the blood of paediatricians are up to 25 times better at protecting against the common respiratory infection RSV than existing antibody therapies, and are now being developed...

Pediatricians are cool to begin with

Now their blood is being used to make new treatments for RSV and colds! 👏🏽👏🏽

www.newscientist.com/article/2516...

64 24 0 3
3 weeks ago

Progress!

268 72 7 5
3 weeks ago

This is fantastic, and it's something that we've been saying for years.

When companies say that are using "AI for climate change", they are referring to much smaller models used for doing things like climate modeling.

Massive generative AI models are NOT USEFUL for mitigating climate change.

141 50 6 1
1 month ago
Preview
The One Metric That Could Reshape Health Progress Tracking the percentage of people dying before old age provides an honest accounting of a population's health.

The percentage of people dying before age 70 is an honest accounting of whether our health systems are working. For the United States, that number tells us we’re failing nearly one in four people.

17 8 1 0
1 month ago
Post image

The US recorded 160 new measles cases in the past week, 44 fewer cases than recorded the week prior, but still more than any week in 2025. The US has recorded 902 total cases in 2026, after 2,128 cases recorded in 2025.

Updates on measles and more in the Tracking Report: mailchi.mp/messages/pan...

20 9 1 1
1 month ago
Post image

oooh we are posting super bowls?

As a specialist in Islamic ceramics *cracks knuckles* I present this fabulous 11th c. lustre painted bowl from Fatimid Cairo depicting a Coptic priest. Its white glaze imitates Chinese porcelain and the lustre technique was invented in Iraq a century earlier.

263 67 9 8
1 month ago
Semi abstract painting reflecting light coming over a horizon, possibly water, encased in a blue oval sky

Georgia O’Keeffe, Light Coming on the Plains, III, 1917 #WomensArt

592 88 1 1
1 month ago
Preview
New York City Partners with W.H.O. as U.S. Withdraws From Global Effort City health authorities are joining a network that counters new pathogens and emerging outbreaks.

After the Trump administration formally withdrew the U.S. from the World Health Organization, the New York City Health Department joined a WHO network aimed at countering new pathogens and emerging outbreaks.

659 132 12 12
1 month ago

😍💔🇨🇦

1 0 0 0
1 month ago
Post image

The largest randomized trial of medical A.I.
—Over 100,000 women in Sweden
—radiologist + AI vs 2 radiologists, in follow-up
—AI added led to 29% more cancer detected, 44% reduced workload, and
—Less cancer dx in subsequent 2 years, and, when found, less aggressive
thelancet.com/journals/lan...

298 93 11 17
1 month ago
Preview
U.S. government has lost more than 10,000 STEM Ph.D.s since Trump took office A Science analysis reveals how many were fired, retired, or quit across 14 agencies

America is bleeding scientific talent

U.S. government has lost more than 10,000 STEM Ph.D.s since Trump took office | Science | AAAS www.science.org/content/arti...

72 48 2 4
1 month ago
Elizabeth Blackwell as a young woman. She is white, with dark hair in a bun.

#OnThisDay, 23 Jan 1849, Elizabeth Blackwell graduates with a medical degree. She is the first woman to receive one in the USA. She was also the first woman on the UK medical register.

#WomenInHistory #OTD #History #WomensHistory #WomenInMedicine #AmericanHistory 🗃️

1,190 314 12 6
1 month ago

Feels like this was going to happen sooner or later. A dairy cow in the Netherlands tests positive for antibodies to #H5N1 #birdflu, which has infected many, many, many cows in the U.S.

67 27 3 4
1 month ago

History repeating...

1 0 0 0
1 month ago
Post image

On this day in 1969, Billy Preston arrived at Apple Studios, where he helps The Beatles complete the Let It Be album during their tumultuous recording sessions by providing a fresh and positive energy to the band.

11 4 0 1
1 month ago
Post image

Still can’t wrap my head around this intentional destruction of science

7,800 research grants terminated or frozen

25,000 scientists and personnel gone from agencies that oversee research

Proposed budget cuts amounting to US$32 billion…

www.nature.com/immersive/d4...

35 22 1 2
1 month ago
Post image Post image

Covers of the 2 leading science journals this week
@science.org and @nature.com
www.science.org/content/arti... www.nature.com/immersive/d4...

288 137 6 7
1 month ago
Preview
An artificial intelligence-powered learning health system to improve sepsis detection and quality of care: a before-and-after study - npj Digital Medicine npj Digital Medicine - An artificial intelligence-powered learning health system to improve sepsis detection and quality of care: a before-and-after study

An AI-powered learning health system is improving sepsis recognition.
The HERACLES algorithm helps lower mortality and enhance clinical documentation through continuous, data-driven feedback.
It reduced sepsis mortality from 20.54% to 15.27% in program wards.
#MedSky

5 4 1 0
1 month ago

Really enjoyed this take on Carney’s speech. ⬇️

103 37 5 0
2 months ago
Preview
If you had to read one book on global health... If there is 1 book that you would like all global health students to read, it would be.....? Here is an impressive list of over 475 books

I added more than 20 books to this already great list of global health books!

communities.springernature.com/posts/if-you...

27 8 3 1
2 months ago
Post image

Continuous glucose monitoring sensor data, with a foundation model, predicts risk of Type 2 diabetes and cardiovascular outcomes better than HbA1c
New @nature.com
www.nature.com/articles/s41...

60 18 0 0
1 month ago
Preview
How One Guy Crowdsourced More Than 500 Dashcams for Minneapolis to Film ICE ‘We have to make sure people are watching. We have to make sure we’re keeping track of our community members.’

Nick Benson distributed 500+ crowdsourced dashcams to document ICE agents in Minneapolis.
The initiative aims to capture evidence of operations following the shooting of observer Renee Good.

7 2 0 1
2 months ago
Preview
An AI revolution in drugmaking is under way It will transform how medicines are made—and the industry itself

An AI revolution in drugmaking is under way
AI is shifting drug discovery from in vitro to in silico. New models cut preclinical timelines to 18 months and may replace control groups with synthetic patients. The aim is to double clinical trial success rates.
#MedSky 💊 #MLSky

3 1 0 0
2 months ago
Preview
OpenAI launches ChatGPT Health, encouraging users to connect their medical records But it’s ‘not intended for diagnosis or treatment.’

OpenAI launched ChatGPT Health as a separate space to analyze medical records and wellness apps.

Their aim is to personalize health insights, though it lacks HIPAA compliance and remains a non diagnostic tool.

#MedSky #MLSky

3 3 0 1