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Matti Heino

@heinonmatti

Crisis preparedness 🛡️ Complex systems approach to behaviour change science. Resilience 🔀 Antifragility. PhD social psychology by accident.

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27.12.2024
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Latest posts by Matti Heino @heinonmatti

Highlighting this Retraction Watch article because it's both incredibly serious, and just the tip of the iceberg. This reflects a culture of sloppiness and self-interest that is far too widespread in clinical "science" circles, from the "5-micron error" to shoddy evidence synthesis practices.

See 🧵

05.03.2026 17:50 👍 34 🔁 15 💬 1 📌 7
Preview
Commercial toilets emit energetic and rapidly spreading aerosol plumes - Scientific Reports Scientific Reports - Commercial toilets emit energetic and rapidly spreading aerosol plumes

More than you ever wanted to know about toilet plumes.

Also, "fecal veneer" is a term @barryhunt008.bsky.social inflicted on my awareness, and I don't see why I should be the only one to suffer.

And yes, it is exactly what it sounds like.

And yes, it is related.

www.nature.com/articles/s41...

14.03.2025 16:25 👍 6 🔁 2 💬 0 📌 1
Graph showing Influenza B levels in the Midwest USA at two year highs.

Graph showing Influenza B levels in the Midwest USA at two year highs.

Bored with stories about Influenza A overwhelming hospitals, etc? Not to worry! Influenza B has now kicked off and is already at two year highs in the Midwest USA. Want to sit out flu season? Wear respirators when indoors where unmasked people are breathing. 😷💉🔬🦠

14.01.2026 03:09 👍 36 🔁 9 💬 0 📌 1
Screenshot of a Virginia Mercury news article titled “Central Va. hospitals recommend masking in health care centers as flu, COVID-19 cases surge,” published January 13, 2026 by Charlotte Rene Woods. The image shows disposable face masks hanging in a shop window, with blurred shoppers in the background, illustrating renewed masking guidance amid rising respiratory virus cases.

Screenshot of a Virginia Mercury news article titled “Central Va. hospitals recommend masking in health care centers as flu, COVID-19 cases surge,” published January 13, 2026 by Charlotte Rene Woods. The image shows disposable face masks hanging in a shop window, with blurred shoppers in the background, illustrating renewed masking guidance amid rising respiratory virus cases.

Central Virginia hospitals recommend masking in health care centers as flu, COVID-19 cases surge

Patients with cough, fever, sneezing or a runny nose are strongly encouraged to wear a mask and tell staff about symptoms when visiting clinics, urgent care centres or emergency rooms.

archive.md/RTlaD

13.01.2026 23:13 👍 101 🔁 34 💬 4 📌 4

Älä 🚫 osta 💰 raketteja 🧨 meillä on sota Euroopassa. Tästä Mitsubishista on enemmän iloa Ukrainassa kuin siitä että perseillään koiranpommien kanssa Suomessa. Tiedät mitä tehdä👇

29.12.2025 17:10 👍 71 🔁 18 💬 1 📌 0

Estimating the value of face coverings during the COVID-19 epidemic: a dynamic causal modelling study

New from @globalhlthtwit.bsky.social of @independentsage.bsky.social

bmjpublichealth.bmj.com/content/bmjp...

27.12.2025 10:37 👍 5 🔁 4 💬 0 📌 0

I have some paradigmatic reservations relating to the nature of causality in behavioural systems, and the expected efficiency of messaging. But curious about people's thoughts?

28.12.2025 12:06 👍 0 🔁 0 💬 1 📌 0

Lahjoitettu 👌

28.12.2025 12:00 👍 6 🔁 3 💬 1 📌 0
Post image

In fact, we’re seeing exponential growth in patient numbers across all disease and age groups in Finland. The trend is strikingly linear on a log scale, with no sign of any slowdown since 2020.

No health system can take this for long. It's just a matter of time.
8/x

23.12.2025 20:36 👍 22 🔁 5 💬 2 📌 2

AND WOULD THAT BE IN ANY PARTICULAR ANIMAL MODEL BY ANY CHANCE

IS THERE SOME IMPORTANT CONTEXT MISSING FROM YOUR HEADLINE PERHAPS

SAY IT WITH ME FOLKS

20.12.2025 13:34 👍 89 🔁 23 💬 3 📌 2

Googling this, learned something new 😁

20.12.2025 13:54 👍 1 🔁 0 💬 0 📌 0
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Quote for today's negotiations:

"The aggressor is always peace-loving; he would prefer to take over our country unopposed."

Carl von Clausewitz in "On War," 1816-1830

02.12.2025 22:19 👍 693 🔁 266 💬 7 📌 11

The "smartphones/social media" discourse suffers from some amazing historical amnesia. There was no 2008 financial crisis and no global pandemic starting in 2020, it's all SCREENS SCREENS SCREENS. Major world events? Just the backdrop against which SCREENS happened.

15.12.2025 07:05 👍 263 🔁 57 💬 16 📌 3
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"From Droplets to Fine Particles: How the pandemic changed our understanding of infection spread"
mattiheino.com/2025/12/13/i...

13.12.2025 21:36 👍 1 🔁 0 💬 0 📌 0
OSF

So I need a link to osf.io/6j2wy/files ➡️ WP4 ➡️ Interview study (expert interviews)

Is this impossible or am I suddenly outdated?

Spontaneous association test: names of people I thought might know: @matti.vuorre.com @malte.the100.ci @dingdingpeng.the100.ci

26.11.2025 10:28 👍 0 🔁 0 💬 1 📌 0
Positive Covid-19 result for a patient this morning - reasons abound to mask in health care

Positive Covid-19 result for a patient this morning - reasons abound to mask in health care

Patient came in with sore throat. While waiting for rapid Strep test result we glanced back at the Covid-19 RAT result: positive. Reminder that masking in health care makes sense, if you don’t want everyone in your waiting room to go home sick, your staff to get sick, and physicians to get sick.

25.11.2025 16:35 👍 1659 🔁 476 💬 32 📌 50
OSF

I'm baffled with the new OSF. I have a project with subfolders for different projects. I want to link the relevant subfolder in a manuscript describing those results. But OSF only allows me to share the root folder ➡️ people need to navigate from there on their own?! Help?

osf.io/6j2wy/files

25.11.2025 21:02 👍 1 🔁 0 💬 1 📌 0

Beautiful 🥲

24.11.2025 19:49 👍 2 🔁 0 💬 0 📌 0
Ottawa citizen screenshot of headline from Nov 18 - sick days increased  almost 14 per cent when public servants returned to office three days a week

Ottawa citizen screenshot of headline from Nov 18 - sick days increased almost 14 per cent when public servants returned to office three days a week

Looks like their plan to boost productivity by ushering everyone back to the office in an ongoing pandemic didn't play out as expected

ottawacitizen.com/public-servi...

20.11.2025 00:48 👍 767 🔁 251 💬 19 📌 29

Keräyksemme on jo kivunnut 62% lukemiin tavoitteesta, kiitos teidän aktiivisten tukijoiden 💪

Aikaa saavuttaa tuo 10 000€ on 17.12. asti, eli käytännössä tonni per viikko olisi vielä kerättävää.

Laitetaanko sanaa kiertämään yhdessä? 🙏

20.11.2025 11:44 👍 4 🔁 4 💬 0 📌 1

If, like me, you lost a loved one in the UK’s deadly second COVID wave, this WhatsApp chat will confirm that the then government has blood on its hands.

20.11.2025 13:58 👍 144 🔁 60 💬 5 📌 2

The most comprehensive dataset of video game play and psychological functioning available with CC0 license at zenodo.org/records/1760...

17.11.2025 08:25 👍 13 🔁 3 💬 0 📌 0

Muistatteko aiemmin hankkimamme drooni-ilmaisimet? Tässä palautetta niiden käyttäjältä, yksityiskohtia mainitsematta.

Tukemalla Ukrainaa meidän kanssamme, te autatte rohkeimpia ja epäitsekkäimpiä ihmisiä Ukrainassa säilyttämään henkensä 🇫🇮🤝🇺🇦

16.11.2025 12:46 👍 11 🔁 5 💬 0 📌 0
WHN graphic with a pale, enlarged illustration of a SARS-CoV-2 particle in the background and the whn.global logo at the top left. A teal line reads: “This is the first of a series of posts on Long COVID by David Brasure.”
Big headline in black: “COVID isn’t a cold. It’s cigarettes all over again.”
Footer line: “The World Health Network is a network devoted to global compassion—working together to inspire collective action through science for a safer, healthier world.”

WHN graphic with a pale, enlarged illustration of a SARS-CoV-2 particle in the background and the whn.global logo at the top left. A teal line reads: “This is the first of a series of posts on Long COVID by David Brasure.” Big headline in black: “COVID isn’t a cold. It’s cigarettes all over again.” Footer line: “The World Health Network is a network devoted to global compassion—working together to inspire collective action through science for a safer, healthier world.”

WHN graphic on a light background with whn.global logo top left and teal line: “This is the first of a series of posts on Long COVID by David Brasure.”
Large headline: “People feel ‘fine’ … until they’re not. Every infection leaves a physiological footprint.”
Body text: “Research continues to show that COVID can cause inflammation, microclotting, and tissue injury across multiple organs — even after ‘mild’ or asymptomatic cases.
Like smoking in the mid-century, the harm isn’t always immediate. People lived their lives normally until, suddenly, they couldn’t. Your body is keeping score.”
Footer line with WHN mission: “The World Health Network is a network devoted to global compassion—working together to inspire collective action through science for a safer, healthier world.”

WHN graphic on a light background with whn.global logo top left and teal line: “This is the first of a series of posts on Long COVID by David Brasure.” Large headline: “People feel ‘fine’ … until they’re not. Every infection leaves a physiological footprint.” Body text: “Research continues to show that COVID can cause inflammation, microclotting, and tissue injury across multiple organs — even after ‘mild’ or asymptomatic cases. Like smoking in the mid-century, the harm isn’t always immediate. People lived their lives normally until, suddenly, they couldn’t. Your body is keeping score.” Footer line with WHN mission: “The World Health Network is a network devoted to global compassion—working together to inspire collective action through science for a safer, healthier world.”

We’re five years into the pandemic, and the science is telling a very different story than “just a cold.” COVID affects blood vessels, organs, metabolism, and cognition — and the impacts compound with each infection.

14.11.2025 19:38 👍 563 🔁 255 💬 14 📌 16
Ultimately, public health agencies encouraging people to take whatever steps they can to improve their health will have a dramatic effect during the next pandemic. Whether simply by stopping smoking, controlling hypertension or diabetes, or getting up and walking more, anything that makes the population healthier will prepare us better for the next pandemic.

The best pandemic preparedness playbook for the United States is making America healthy again.

Ultimately, public health agencies encouraging people to take whatever steps they can to improve their health will have a dramatic effect during the next pandemic. Whether simply by stopping smoking, controlling hypertension or diabetes, or getting up and walking more, anything that makes the population healthier will prepare us better for the next pandemic. The best pandemic preparedness playbook for the United States is making America healthy again.

Jay Bhattacharya's plan for a new pandemic is for everyone to suddenly be healthy.

14.11.2025 22:15 👍 334 🔁 75 💬 40 📌 37

40 years later… And the thing is, we already have mountains of data NOW that show what COVID does to brains. Why can’t we acknowledge it? Why can’t we face it? Why can’t we say it?

14.11.2025 23:12 👍 277 🔁 85 💬 11 📌 4

Tällä kikalla ei miljoonia tienata, mutta oletteko harkinneet laittaa tilin omistajan (kaikkein vähiten tärkeä tieto) viestin alimmaiseksi? Itse meinasin viime yönä jättää lahjoittamatta kun ajattelin ettei aivot pysty verkkopankkiin kirjautumista ja tilinron näpyttelyä, kunnes huomasin mobilepayn

09.11.2025 23:51 👍 1 🔁 0 💬 1 📌 0

Don’t know if it even made the news outside Ukraine.

Three combined heat and power plants fully stopped working after last night’s enormous attack. Unclear if anything can be fixed, millions of people are completely without electricity, heating or running water. Before winter.

08.11.2025 21:22 👍 536 🔁 229 💬 12 📌 8

Yeah so several major Ukrainian cities are in a complete blackout right now. 0 generation from thermal plants and 0 idea when the power will be back. Just please don’t forget us

08.11.2025 21:23 👍 2478 🔁 701 💬 61 📌 15

Doing most of my work in rmarkdown docs, I'm used to seeing output below code chunks though, and it's needing a bit of getting-used-to

09.11.2025 23:40 👍 0 🔁 0 💬 1 📌 0