Marc Veldhoen
@marcveld.bsky.social
Professor of Immunology 🇳🇱 🇬🇧
Lisbon, 🇵🇹
#Immunology
Time for Science, not silence
https://scholar.google.co.uk/citations?user=7vG1jLIAAAAJ&hl=en
https://orcid.org/0000-0002-1478-9562
threads.net/@marc_veld
mastodon.online/@marc_veld
Lisbon, 🇵🇹
#Immunology
Time for Science, not silence
https://scholar.google.co.uk/citations?user=7vG1jLIAAAAJ&hl=en
https://orcid.org/0000-0002-1478-9562
threads.net/@marc_veld
mastodon.online/@marc_veld
Pinned
CovidDoom and antivax disinformation accounts thrive on fear. They claim science hides “the truth,” but offer no solid evidence of their own, only conjecture. By turning uncertainty into conspiracy, they erode trust in experts and data, making evidence itself seem suspicious.
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Autoantibodies mediate pain and sensory dysfunction in post-COVID syndrome
Pre-print, but with a similar observation as at least two previous reports: some autoantobodies may be responsible for some symptoms of post-viral disease.
www.researchsquare.c...
1/8
Pre-print, but with a similar observation as at least two previous reports: some autoantobodies may be responsible for some symptoms of post-viral disease.
www.researchsquare.c...
1/8
Autoantibodies mediate pain and sensory dysfunction in post-COVID syndrome | Research Square
Pain and fatigue are common but poorly understood features of post-COVID Syndrome (PCS). To probe the mechanistic basis of these symptoms, we investigated sensory functions in patients with widespread pain attributed to PCS. Quantitative sensory testing revealed increased mechanical pain sensi...
www.researchsquare.com
November 25, 2025 at 4:13 PM
Autoantibodies mediate pain and sensory dysfunction in post-COVID syndrome
Pre-print, but with a similar observation as at least two previous reports: some autoantobodies may be responsible for some symptoms of post-viral disease.
www.researchsquare.c...
1/8
Pre-print, but with a similar observation as at least two previous reports: some autoantobodies may be responsible for some symptoms of post-viral disease.
www.researchsquare.c...
1/8
Predictable?
Don't use income generating platforms with algorithms: clickbait, disinformation and a race to the bottom is the inevitable result.
Don't use income generating platforms with algorithms: clickbait, disinformation and a race to the bottom is the inevitable result.
Twitter pays people based on engagement (views, retweets, comments, etc). It appears that many MAGA accounts are based abroad and they use AI technology to generate low-effort rage bait.
My guess is that this will get worse as AI tech improves. For instance, fake videos of minorities doing crime.
My guess is that this will get worse as AI tech improves. For instance, fake videos of minorities doing crime.
November 25, 2025 at 1:39 PM
Predictable?
Don't use income generating platforms with algorithms: clickbait, disinformation and a race to the bottom is the inevitable result.
Don't use income generating platforms with algorithms: clickbait, disinformation and a race to the bottom is the inevitable result.
Reposted by Marc Veldhoen
Damage to telomeres, the ends of chromosomes, can initiate cancerous processes.
With a #HealthResearch grant, Claus Maria Azzalin (@gimmfoundation.bsky.social) is studying the role played by TERRA RNA in telomere repair, which could improve our understanding of cancer.
https://tinyurl.com/yjh7j59c
With a #HealthResearch grant, Claus Maria Azzalin (@gimmfoundation.bsky.social) is studying the role played by TERRA RNA in telomere repair, which could improve our understanding of cancer.
https://tinyurl.com/yjh7j59c
November 20, 2025 at 9:58 AM
Damage to telomeres, the ends of chromosomes, can initiate cancerous processes.
With a #HealthResearch grant, Claus Maria Azzalin (@gimmfoundation.bsky.social) is studying the role played by TERRA RNA in telomere repair, which could improve our understanding of cancer.
https://tinyurl.com/yjh7j59c
With a #HealthResearch grant, Claus Maria Azzalin (@gimmfoundation.bsky.social) is studying the role played by TERRA RNA in telomere repair, which could improve our understanding of cancer.
https://tinyurl.com/yjh7j59c
Reposted by Marc Veldhoen
The lack of specific targets in many tumours ⬇️ the effectiveness of immunotherapies.
With a #HealthResearch grant ➕ FCT João Lacerda (@gimmfoundation.bsky.social) is developing CAR-T cells that target a molecule found almost exclusively in tumours to improve therapies.
https://tinyurl.com/ykbcmcjv
With a #HealthResearch grant ➕ FCT João Lacerda (@gimmfoundation.bsky.social) is developing CAR-T cells that target a molecule found almost exclusively in tumours to improve therapies.
https://tinyurl.com/ykbcmcjv
November 20, 2025 at 10:45 AM
The lack of specific targets in many tumours ⬇️ the effectiveness of immunotherapies.
With a #HealthResearch grant ➕ FCT João Lacerda (@gimmfoundation.bsky.social) is developing CAR-T cells that target a molecule found almost exclusively in tumours to improve therapies.
https://tinyurl.com/ykbcmcjv
With a #HealthResearch grant ➕ FCT João Lacerda (@gimmfoundation.bsky.social) is developing CAR-T cells that target a molecule found almost exclusively in tumours to improve therapies.
https://tinyurl.com/ykbcmcjv
Reposted by Marc Veldhoen
Incubation times.
This is the time between getting infected and developing symptoms of an infectious disease. Typically this is measured in days, sometimes weeks.
It seems something technical. Why would understanding this matter to you?
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This is the time between getting infected and developing symptoms of an infectious disease. Typically this is measured in days, sometimes weeks.
It seems something technical. Why would understanding this matter to you?
1/9
November 25, 2024 at 10:08 AM
Incubation times.
This is the time between getting infected and developing symptoms of an infectious disease. Typically this is measured in days, sometimes weeks.
It seems something technical. Why would understanding this matter to you?
1/9
This is the time between getting infected and developing symptoms of an infectious disease. Typically this is measured in days, sometimes weeks.
It seems something technical. Why would understanding this matter to you?
1/9
Reposted by Marc Veldhoen
What will population immunity to SARS-CoV-2 look like in a post-vaccine world?
An updated outlook (2025)
Arriving coming weekend, via my Substack. What did we get right in 2020, what didn´t we anticipate? What does 5 years of data show?
An updated outlook (2025)
Arriving coming weekend, via my Substack. What did we get right in 2020, what didn´t we anticipate? What does 5 years of data show?
November 24, 2025 at 10:20 PM
What will population immunity to SARS-CoV-2 look like in a post-vaccine world?
An updated outlook (2025)
Arriving coming weekend, via my Substack. What did we get right in 2020, what didn´t we anticipate? What does 5 years of data show?
An updated outlook (2025)
Arriving coming weekend, via my Substack. What did we get right in 2020, what didn´t we anticipate? What does 5 years of data show?
Reposted by Marc Veldhoen
No, SARS-CoV-2 is not reducing our intelligence
Why this myth refuses to die
The idea that SARS-CoV-2 infections, or worse, reinfections, are collectively reducing human intelligence does not hold.
open.substack.com/pu...
Why this myth refuses to die
The idea that SARS-CoV-2 infections, or worse, reinfections, are collectively reducing human intelligence does not hold.
open.substack.com/pu...
November 22, 2025 at 3:55 PM
No, SARS-CoV-2 is not reducing our intelligence
Why this myth refuses to die
The idea that SARS-CoV-2 infections, or worse, reinfections, are collectively reducing human intelligence does not hold.
open.substack.com/pu...
Why this myth refuses to die
The idea that SARS-CoV-2 infections, or worse, reinfections, are collectively reducing human intelligence does not hold.
open.substack.com/pu...
Reposted by Marc Veldhoen
@EMBO Practical Course
Pipetting scRNA-seq data into computational cells
18 – 23 May 2026 | Oeiras/Lisbon, Portugal @gimmfoundation.bsky.social
Registration open!
Pipetting scRNA-seq data into computational cells
18 – 23 May 2026 | Oeiras/Lisbon, Portugal @gimmfoundation.bsky.social
Registration open!
Pipetting scRNA-seq data into computational cells
Single-cell transcriptomics is transforming biology, uncovering hidden cell states, dynamic transitions, and intricate interactions across systems from immunity to cancer. Yet as these technologies s…
meetings.embo.org
November 23, 2025 at 11:37 AM
@EMBO Practical Course
Pipetting scRNA-seq data into computational cells
18 – 23 May 2026 | Oeiras/Lisbon, Portugal @gimmfoundation.bsky.social
Registration open!
Pipetting scRNA-seq data into computational cells
18 – 23 May 2026 | Oeiras/Lisbon, Portugal @gimmfoundation.bsky.social
Registration open!
Reposted by Marc Veldhoen
"Peace without justice is a pause"
This is not a peace plan. It is a proposal that weakens Ukraine and divides America from Europe, preparing the way for a larger war in the future. In the meantime, it benefits unnamed Russian and American investors, at the expense of everyone else.
www.theatlantic.com/ideas/2025/1...
www.theatlantic.com/ideas/2025/1...
Trump Has a Recipe for War and Corruption, Not Peace
Who would benefit from the White House’s 28-point proposal for Ukraine?
www.theatlantic.com
November 22, 2025 at 4:46 PM
"Peace without justice is a pause"
What will population immunity to SARS-CoV-2 look like in a post-vaccine world?
An updated outlook (2025)
Arriving coming weekend, via my Substack. What did we get right in 2020, what didn´t we anticipate? What does 5 years of data show?
An updated outlook (2025)
Arriving coming weekend, via my Substack. What did we get right in 2020, what didn´t we anticipate? What does 5 years of data show?
November 24, 2025 at 10:20 PM
What will population immunity to SARS-CoV-2 look like in a post-vaccine world?
An updated outlook (2025)
Arriving coming weekend, via my Substack. What did we get right in 2020, what didn´t we anticipate? What does 5 years of data show?
An updated outlook (2025)
Arriving coming weekend, via my Substack. What did we get right in 2020, what didn´t we anticipate? What does 5 years of data show?
Some will keep lying to their followers, making unrealistic claims and pronounsations. Vaccines causeing "sterile" immunity do not exist. It may sometimes appear like it, due to the slow pathogen, but antibodies, our only infection protection: always, really always, wane!
November 24, 2025 at 9:35 PM
Some will keep lying to their followers, making unrealistic claims and pronounsations. Vaccines causeing "sterile" immunity do not exist. It may sometimes appear like it, due to the slow pathogen, but antibodies, our only infection protection: always, really always, wane!
The law is still holding. Judges operating the law, not power or ideology.
Federal judge dismisses indictments against Letitia James and James Comey, saying Lindsey Halligan appointment was unlawful
Federal judge dismisses indictments against Letitia James and James Comey, saying Lindsey Halligan appointment was unlawful
Federal judge dismisses indictments against Letitia James and James Comey, saying Lindsey Halligan appointment was unlawful | CNN Politics
A federal judge dismissed the indictments against former FBI Director James Comey and New York Attorney General Letitia James on Monday.
www.cnn.com
November 24, 2025 at 7:24 PM
The law is still holding. Judges operating the law, not power or ideology.
Federal judge dismisses indictments against Letitia James and James Comey, saying Lindsey Halligan appointment was unlawful
Federal judge dismisses indictments against Letitia James and James Comey, saying Lindsey Halligan appointment was unlawful
In this upside-down world, the discussion isn’t about restraining the aggressor; it’s about capping the defence forces and reducing the territory of the nation that was attacked. The invader gets rewarded; the invaded gets lectured. What a time.
Zelensky says giving Ukrainian territory to Russia is 'main problem' after peace talks with US
"Putin wants legal recognition to what he has stolen," says President Zelensky after weekend peace talks between the US and Ukraine in Geneva.
www.bbc.com
November 24, 2025 at 9:59 AM
In this upside-down world, the discussion isn’t about restraining the aggressor; it’s about capping the defence forces and reducing the territory of the nation that was attacked. The invader gets rewarded; the invaded gets lectured. What a time.
Reposted by Marc Veldhoen
When the history of the extreme anti-vaccine and conspiracy theory movement is written, this photo should be seen as absolutely central and foundational.
Three physicians supporting anti-vaccine pronouncements from Trump & RFK Jr.
Three physicians supporting anti-vaccine pronouncements from Trump & RFK Jr.
November 24, 2025 at 9:49 AM
When the history of the extreme anti-vaccine and conspiracy theory movement is written, this photo should be seen as absolutely central and foundational.
Three physicians supporting anti-vaccine pronouncements from Trump & RFK Jr.
Three physicians supporting anti-vaccine pronouncements from Trump & RFK Jr.
Reposted by Marc Veldhoen
When I have something to say, I say it openly under my own name. Claims that I hide behind “many accounts” are noise from anti-science factions who can’t back up their accusations. Facts matter. Integrity matters. I stand by both.
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November 23, 2025 at 11:14 AM
When I have something to say, I say it openly under my own name. Claims that I hide behind “many accounts” are noise from anti-science factions who can’t back up their accusations. Facts matter. Integrity matters. I stand by both.
1/3
1/3
Reposted by Marc Veldhoen
What is wrong with these people?
Exept that all respiratory viruses are transferable via air, all of this is nonsense.
Exept that all respiratory viruses are transferable via air, all of this is nonsense.
November 23, 2025 at 8:53 PM
What is wrong with these people?
Exept that all respiratory viruses are transferable via air, all of this is nonsense.
Exept that all respiratory viruses are transferable via air, all of this is nonsense.
Reposted by Marc Veldhoen
Facts aren’t cruelty. It’s the first step toward recovery. And those fighting misinformation aren’t your enemies, they’re the reason real progress against #LongCovid is possible. But only with funding, good and defined cohorts, appropriate methods, and with real solid data.
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October 20, 2025 at 4:45 PM
Facts aren’t cruelty. It’s the first step toward recovery. And those fighting misinformation aren’t your enemies, they’re the reason real progress against #LongCovid is possible. But only with funding, good and defined cohorts, appropriate methods, and with real solid data.
10/10
10/10
What is wrong with these people?
Exept that all respiratory viruses are transferable via air, all of this is nonsense.
Exept that all respiratory viruses are transferable via air, all of this is nonsense.
November 23, 2025 at 8:53 PM
What is wrong with these people?
Exept that all respiratory viruses are transferable via air, all of this is nonsense.
Exept that all respiratory viruses are transferable via air, all of this is nonsense.
Reposted by Marc Veldhoen
Why is it so difficult for a pathogen to escape our immune system?
We have many detector that recognise conserved parts of pathogens.
We have T and B cells that can virtually recognise specifically any patogen.
And we are different individually what we recognise.
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We have many detector that recognise conserved parts of pathogens.
We have T and B cells that can virtually recognise specifically any patogen.
And we are different individually what we recognise.
1/10
March 30, 2024 at 12:31 PM
Why is it so difficult for a pathogen to escape our immune system?
We have many detector that recognise conserved parts of pathogens.
We have T and B cells that can virtually recognise specifically any patogen.
And we are different individually what we recognise.
1/10
We have many detector that recognise conserved parts of pathogens.
We have T and B cells that can virtually recognise specifically any patogen.
And we are different individually what we recognise.
1/10
Be very careful with these posts. Never take any medicine, no matter how innocent it may seem, without consulting a qualified physician.
Doxycycline is an antibiotic. It inhibits the protein-generating machinery (ribosomes) of bacteria. This prevents bacteria from multiplying
1/6
Doxycycline is an antibiotic. It inhibits the protein-generating machinery (ribosomes) of bacteria. This prevents bacteria from multiplying
1/6
November 23, 2025 at 8:03 PM
Be very careful with these posts. Never take any medicine, no matter how innocent it may seem, without consulting a qualified physician.
Doxycycline is an antibiotic. It inhibits the protein-generating machinery (ribosomes) of bacteria. This prevents bacteria from multiplying
1/6
Doxycycline is an antibiotic. It inhibits the protein-generating machinery (ribosomes) of bacteria. This prevents bacteria from multiplying
1/6
Reposted by Marc Veldhoen
The real harm to #LongCovid patients isn’t coming from most doctors or scientists; it’s coming from activists spreading false claims about COVID-19, twisting science, and vilifying experts. Misrepresentation doesn’t help patients; it isolates them from real care.
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October 20, 2025 at 4:44 PM
The real harm to #LongCovid patients isn’t coming from most doctors or scientists; it’s coming from activists spreading false claims about COVID-19, twisting science, and vilifying experts. Misrepresentation doesn’t help patients; it isolates them from real care.
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Reposted by Marc Veldhoen
How does MDPI keep stuffing their journals?
By cold emailing random scientists about “special issues” in fields they’ve never worked in, but hey, who needs expertise when the business model is volume?
1/2
By cold emailing random scientists about “special issues” in fields they’ve never worked in, but hey, who needs expertise when the business model is volume?
1/2
November 21, 2025 at 10:56 PM
How does MDPI keep stuffing their journals?
By cold emailing random scientists about “special issues” in fields they’ve never worked in, but hey, who needs expertise when the business model is volume?
1/2
By cold emailing random scientists about “special issues” in fields they’ve never worked in, but hey, who needs expertise when the business model is volume?
1/2
Reposted by Marc Veldhoen
Are we vaccinating under 2s more than a generation (30 years) ago? We used fewer vaccines, protecting against 8 infectious diseases. These complex vaccines, containing over 3000 antigens, were good, but there was room for improvement.
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November 15, 2024 at 2:50 PM
Are we vaccinating under 2s more than a generation (30 years) ago? We used fewer vaccines, protecting against 8 infectious diseases. These complex vaccines, containing over 3000 antigens, were good, but there was room for improvement.
1/8
1/8
Reposted by Marc Veldhoen
Retraction notice to Effect of early treatment with metformin on risk of emergency care and hospitalization among patients with COVID-19: the TOGETHER randomized platform clinical trial [The Lancet Regional Health–Americas Volume 6, Feb 2022, 100142]
www.thelancet.com/jo...
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www.thelancet.com/jo...
1/2
Retraction notice to Effect of early treatment with metformin on risk of emergency care and hospitalization among patients with COVID-19: the TOGETHER randomized platform clinical trial [The Lancet Regional Health–Americas Volume 6, February 2022, 100142]
This article has been retracted: please see Elsevier Policy on Article Withdrawal
(https://www.elsevier.com/about/policies/article-withdrawal).In December 2021, The
Lancet Regional Health-Americas published the results of the platform randomized TOGETHER
trial, which evaluated the effect of early treatment with metformin on the risk of
emergency care and hospitalization among patients with COVID-19.1 In January, 2024,
errors in the total population considered for the analysis were brought to our attention
and we issued an Expression of concern.
www.thelancet.com
November 23, 2025 at 10:53 AM
Retraction notice to Effect of early treatment with metformin on risk of emergency care and hospitalization among patients with COVID-19: the TOGETHER randomized platform clinical trial [The Lancet Regional Health–Americas Volume 6, Feb 2022, 100142]
www.thelancet.com/jo...
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www.thelancet.com/jo...
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Reposted by Marc Veldhoen
RFK Jr hospital
Don't think this can't happen
Don't think this can't happen
RFK Jr. Hospital - The Only Hospital That Follows the Advice of the Health Secretary - A New TV Show
Ronny Chieng presents a hilarious fake ad for a new TV show: What if a hospital actually followed RFK Jr.'s medical advice? The result? Blood, chaos, and raw milk everywhere. Watch this satirical masterpiece where medicine meets "alternative facts."
Coming soon after CSI: Epstein Files! This parod
youtube.com
November 23, 2025 at 9:26 AM
RFK Jr hospital
Don't think this can't happen
Don't think this can't happen