Marieke van Ham
@hammarieke.bsky.social
B cell immunologist focussing on antibody formation and pandemics research, Sanquin Blood Supply and SILS, Faculty of Science, University of Amsterdam, the Netherlands. My texts are on personal title, but data-based.
Reposted by Marieke van Ham
James Dewey Watson – who won the Nobel Prize for his role in divining the structure of DNA; was instrumental in initiating and propelling the Human Genome Project; and who became notorious for his history of racist and sexist comments – has died at 97.
go.nature.com/3JKHqvB
go.nature.com/3JKHqvB
DNA pioneer James Watson has died ― colleagues wrestle with his legacy
The co-discoverer of the structure of DNA helped to strengthen a US research institute and wrote a classic textbook, but also earned a reputation for racist and sexist comments.
go.nature.com
November 8, 2025 at 4:03 AM
James Dewey Watson – who won the Nobel Prize for his role in divining the structure of DNA; was instrumental in initiating and propelling the Human Genome Project; and who became notorious for his history of racist and sexist comments – has died at 97.
go.nature.com/3JKHqvB
go.nature.com/3JKHqvB
Reposted by Marieke van Ham
🚀 One week until the #EFIS on Tour Symposium lands in Bucharest, 🇷🇴
🤝 Chance to meet the EFIS Board and network w/ colleagues across Europe
✅ Finalize registration today via QR code
📅 November 14, 2025 at 13:00
#immunology
@yefis-immunology.bsky.social @hammarieke.bsky.social @bojanpolic.bsky.social
🤝 Chance to meet the EFIS Board and network w/ colleagues across Europe
✅ Finalize registration today via QR code
📅 November 14, 2025 at 13:00
#immunology
@yefis-immunology.bsky.social @hammarieke.bsky.social @bojanpolic.bsky.social
November 7, 2025 at 1:15 PM
🚀 One week until the #EFIS on Tour Symposium lands in Bucharest, 🇷🇴
🤝 Chance to meet the EFIS Board and network w/ colleagues across Europe
✅ Finalize registration today via QR code
📅 November 14, 2025 at 13:00
#immunology
@yefis-immunology.bsky.social @hammarieke.bsky.social @bojanpolic.bsky.social
🤝 Chance to meet the EFIS Board and network w/ colleagues across Europe
✅ Finalize registration today via QR code
📅 November 14, 2025 at 13:00
#immunology
@yefis-immunology.bsky.social @hammarieke.bsky.social @bojanpolic.bsky.social
Reposted by Marieke van Ham
Ancient DNA studies usually link changes in lifestyle and language in the past to population movements. But not always! A new study in @nature.com reveals a South American ancestry that stayed steady for 8,500 years, despite major cultural and linguistic shifts. @science.org 🏺 🧬
Mystery group lived in central Argentina for millennia, ancient DNA reveals
New study fills major gap in genetic map of ancient human migrations
www.science.org
November 5, 2025 at 4:34 PM
Ancient DNA studies usually link changes in lifestyle and language in the past to population movements. But not always! A new study in @nature.com reveals a South American ancestry that stayed steady for 8,500 years, despite major cultural and linguistic shifts. @science.org 🏺 🧬
Reposted by Marieke van Ham
The ability of humans to think rationally and weigh the evidence when making a choice is well known.
In a new Science study, researchers report that chimpanzees can also update their beliefs on the basis of the quantity and quality of new evidence. https://scim.ag/4nAmk0Q
In a new Science study, researchers report that chimpanzees can also update their beliefs on the basis of the quantity and quality of new evidence. https://scim.ag/4nAmk0Q
Chimpanzees rationally revise their beliefs
The selective revision of beliefs in light of new evidence has been considered one of the hallmarks of human-level rationality. However, tests of this ability in other species are lacking. We examined...
scim.ag
November 5, 2025 at 8:55 PM
The ability of humans to think rationally and weigh the evidence when making a choice is well known.
In a new Science study, researchers report that chimpanzees can also update their beliefs on the basis of the quantity and quality of new evidence. https://scim.ag/4nAmk0Q
In a new Science study, researchers report that chimpanzees can also update their beliefs on the basis of the quantity and quality of new evidence. https://scim.ag/4nAmk0Q
Reposted by Marieke van Ham
Data: Risks of vascular, inflammatory conditions in kids higher after #COVID infection than vaccination
Over 6 months, COVID infection led to 2.24 extra cases of myocarditis or pericarditis per 100,000 children, versus 0.85 per 100,000 after vaccination.
www.cidrap.umn.edu/c...
Over 6 months, COVID infection led to 2.24 extra cases of myocarditis or pericarditis per 100,000 children, versus 0.85 per 100,000 after vaccination.
www.cidrap.umn.edu/c...
November 5, 2025 at 9:00 PM
Data: Risks of vascular, inflammatory conditions in kids higher after #COVID infection than vaccination
Over 6 months, COVID infection led to 2.24 extra cases of myocarditis or pericarditis per 100,000 children, versus 0.85 per 100,000 after vaccination.
www.cidrap.umn.edu/c...
Over 6 months, COVID infection led to 2.24 extra cases of myocarditis or pericarditis per 100,000 children, versus 0.85 per 100,000 after vaccination.
www.cidrap.umn.edu/c...
Reposted by Marieke van Ham
FDA approves new IV antibiotic for complicated urinary tract infections
The intravenous formulation of fosfomycin has a novel mechanism of action and no known cross-resistance to other antibiotic classes.
The intravenous formulation of fosfomycin has a novel mechanism of action and no known cross-resistance to other antibiotic classes.
FDA approves new IV antibiotic for complicated urinary tract infections
The intravenous formulation of fosfomycin has a novel mechanism of action an no known cross-resistance to other antibiotic classes.
www.cidrap.umn.edu
November 5, 2025 at 9:31 PM
FDA approves new IV antibiotic for complicated urinary tract infections
The intravenous formulation of fosfomycin has a novel mechanism of action and no known cross-resistance to other antibiotic classes.
The intravenous formulation of fosfomycin has a novel mechanism of action and no known cross-resistance to other antibiotic classes.
Reposted by Marieke van Ham
Scientists can analyze tree rings from coffins for clues to past climates. https://scim.ag/43AUj2n
Tree rings from ancient coffins offer clues to Earth’s past
Wood from gravesites can help reconstruct historic temperatures, floods, and droughts
scim.ag
November 5, 2025 at 11:30 PM
Scientists can analyze tree rings from coffins for clues to past climates. https://scim.ag/43AUj2n
Reposted by Marieke van Ham
⏳ Two weeks to go until #EFISonTour Bucharest 2025!
Get ready for inspiring science, networking + collaboration. Repost & invite colleagues!
📅 Nov 14 | 📍 Victor Babeș National Institute of Pathology
Register using the QR code👇
#immunology
@yefis-immunology.bsky.social @hammarieke.bsky.social
Get ready for inspiring science, networking + collaboration. Repost & invite colleagues!
📅 Nov 14 | 📍 Victor Babeș National Institute of Pathology
Register using the QR code👇
#immunology
@yefis-immunology.bsky.social @hammarieke.bsky.social
October 30, 2025 at 7:13 AM
⏳ Two weeks to go until #EFISonTour Bucharest 2025!
Get ready for inspiring science, networking + collaboration. Repost & invite colleagues!
📅 Nov 14 | 📍 Victor Babeș National Institute of Pathology
Register using the QR code👇
#immunology
@yefis-immunology.bsky.social @hammarieke.bsky.social
Get ready for inspiring science, networking + collaboration. Repost & invite colleagues!
📅 Nov 14 | 📍 Victor Babeș National Institute of Pathology
Register using the QR code👇
#immunology
@yefis-immunology.bsky.social @hammarieke.bsky.social
Reposted by Marieke van Ham
On #NationalChocolateDay, learn more about why our love affair with chocolate is much older than we thought. https://scim.ag/42WrGfI
World's oldest chocolate was made 5300 years ago—in a South American rainforest
Ancient pots shift the nexus of chocolatemaking from Central America to modern Ecuador
scim.ag
October 28, 2025 at 1:27 PM
On #NationalChocolateDay, learn more about why our love affair with chocolate is much older than we thought. https://scim.ag/42WrGfI
Reposted by Marieke van Ham
For 200+ years, we thought we knew what killed Napoleon's army. Turns out, we were wrong. The truth was hiding in their teeth. 🧵👇
October 28, 2025 at 3:03 PM
For 200+ years, we thought we knew what killed Napoleon's army. Turns out, we were wrong. The truth was hiding in their teeth. 🧵👇
Reposted by Marieke van Ham
Since 2005, #ECDC has worked together with the WHO Regional Office for Europe on a range of areas, including surveillance of communicable diseases, preparedness, and response, to improve public health across Europe and strengthen health security.
#RC75CPH #EPW2 #HealthSecurity
#RC75CPH #EPW2 #HealthSecurity
October 28, 2025 at 5:20 PM
Since 2005, #ECDC has worked together with the WHO Regional Office for Europe on a range of areas, including surveillance of communicable diseases, preparedness, and response, to improve public health across Europe and strengthen health security.
#RC75CPH #EPW2 #HealthSecurity
#RC75CPH #EPW2 #HealthSecurity
Reposted by Marieke van Ham
People being treated for certain deadly cancers lived longer if they had received an mRNA-based vaccine against COVID-19 than if they hadn’t
go.nature.com/42XuWY6
go.nature.com/42XuWY6
People with some cancers live longer after a COVID vaccine
Nature - mRNA vaccines seem to boost the effectiveness of an immune therapy for skin and lung cancer ― in an unexpected way.
go.nature.com
October 25, 2025 at 12:38 PM
People being treated for certain deadly cancers lived longer if they had received an mRNA-based vaccine against COVID-19 than if they hadn’t
go.nature.com/42XuWY6
go.nature.com/42XuWY6
Reposted by Marieke van Ham
"...researchers who invest time in their students tend to lead more-productive, more-collaborative groups and attract stronger future students than those who do not." "Time spent with the next generation of scientists is an investment."
www.nature.com/articles/d41...
www.nature.com/articles/d41...
What makes PhD students happy? Good supervision
Supervisors who invest in positive mentoring relationships with their PhD candidates also reap the benefits for their own research.
www.nature.com
October 24, 2025 at 10:46 PM
"...researchers who invest time in their students tend to lead more-productive, more-collaborative groups and attract stronger future students than those who do not." "Time spent with the next generation of scientists is an investment."
www.nature.com/articles/d41...
www.nature.com/articles/d41...
Reposted by Marieke van Ham
Ending polio isn’t just a goal, it’s a promise to children everywhere. With support from global partners, governments, and health workers, we won’t stop until the job is done. #EndPolio #WorldPolioDay
@unicef.org @who.int @gatesfoundation.bsky.social
@unicef.org @who.int @gatesfoundation.bsky.social
October 24, 2025 at 6:01 AM
Ending polio isn’t just a goal, it’s a promise to children everywhere. With support from global partners, governments, and health workers, we won’t stop until the job is done. #EndPolio #WorldPolioDay
@unicef.org @who.int @gatesfoundation.bsky.social
@unicef.org @who.int @gatesfoundation.bsky.social
Reposted by Marieke van Ham
#RSV vaccine for older adults 92% protective against poor outcomes, real-world study estimates
Adjusted effectiveness against emergency department visits/hospitalizations was 95% among patients aged 75 and older.
www.cidrap.umn.edu/r...
Adjusted effectiveness against emergency department visits/hospitalizations was 95% among patients aged 75 and older.
www.cidrap.umn.edu/r...
October 22, 2025 at 7:37 PM
#RSV vaccine for older adults 92% protective against poor outcomes, real-world study estimates
Adjusted effectiveness against emergency department visits/hospitalizations was 95% among patients aged 75 and older.
www.cidrap.umn.edu/r...
Adjusted effectiveness against emergency department visits/hospitalizations was 95% among patients aged 75 and older.
www.cidrap.umn.edu/r...
Reposted by Marieke van Ham
Survey exposes gaps in what people know about the risks of Lyme disease
Most respondents said they were aware of the tick-borne disease and spent time outdoors, but less than half said they took steps to prevent infection.
www.cidrap.umn.edu/l...
Photo: Jon Cox / Flickr cc
Most respondents said they were aware of the tick-borne disease and spent time outdoors, but less than half said they took steps to prevent infection.
www.cidrap.umn.edu/l...
Photo: Jon Cox / Flickr cc
October 22, 2025 at 8:37 PM
Survey exposes gaps in what people know about the risks of Lyme disease
Most respondents said they were aware of the tick-borne disease and spent time outdoors, but less than half said they took steps to prevent infection.
www.cidrap.umn.edu/l...
Photo: Jon Cox / Flickr cc
Most respondents said they were aware of the tick-borne disease and spent time outdoors, but less than half said they took steps to prevent infection.
www.cidrap.umn.edu/l...
Photo: Jon Cox / Flickr cc
Reposted by Marieke van Ham
🤝 #ECDC works together with partners like the @ec.europa.eu's Joint Research Centre (JRC) to better track and understand vector-borne disease risks in Europe.
Find out more about the collaboration and what it brings:
bit.ly/3IY9zPL
Find out more about the collaboration and what it brings:
bit.ly/3IY9zPL
Watch out for the bugs
Due to climate change, mosquito-borne infectious diseases once considered limited to tropical regions are increasingly (re-)appearing in Europe.
bit.ly
October 22, 2025 at 9:12 PM
🤝 #ECDC works together with partners like the @ec.europa.eu's Joint Research Centre (JRC) to better track and understand vector-borne disease risks in Europe.
Find out more about the collaboration and what it brings:
bit.ly/3IY9zPL
Find out more about the collaboration and what it brings:
bit.ly/3IY9zPL
Reposted by Marieke van Ham
@who.int led medical evacuation of 41 critical patients & 145 companions out of #Gaza, first since the ceasefire.
~15 000 patients are waiting for approval to receive medical care outside Gaza. We call on countries to show solidarity & for all routes to be opened to expedite the medical evacuation.
~15 000 patients are waiting for approval to receive medical care outside Gaza. We call on countries to show solidarity & for all routes to be opened to expedite the medical evacuation.
October 22, 2025 at 9:31 PM
Reposted by Marieke van Ham
Precision targeting of autoreactive B cells in systemic lupus erythematosus using anti-9G4 idiotope synthetic immune receptor T cells https://www.biorxiv.org/content/10.1101/2025.10.19.682634v1
October 20, 2025 at 3:15 AM
Precision targeting of autoreactive B cells in systemic lupus erythematosus using anti-9G4 idiotope synthetic immune receptor T cells https://www.biorxiv.org/content/10.1101/2025.10.19.682634v1
Reposted by Marieke van Ham
Reposted by Marieke van Ham
“The Ebola virus disease (EVD) outbreak in the Democratic Republic of the Congo (DRC) shows signs of containment, with no new confirmed or probable cases reported since our last update”
Some cautious good news from @who.int
#IDSky
hq_who_departmentofcommunications.cmail19.com/t/d-l-ggllll...
Some cautious good news from @who.int
#IDSky
hq_who_departmentofcommunications.cmail19.com/t/d-l-ggllll...
October 8, 2025 at 5:25 PM
“The Ebola virus disease (EVD) outbreak in the Democratic Republic of the Congo (DRC) shows signs of containment, with no new confirmed or probable cases reported since our last update”
Some cautious good news from @who.int
#IDSky
hq_who_departmentofcommunications.cmail19.com/t/d-l-ggllll...
Some cautious good news from @who.int
#IDSky
hq_who_departmentofcommunications.cmail19.com/t/d-l-ggllll...
Reposted by Marieke van Ham
MIT President Kornbluth announced on Friday the university “cannot support” Trump’s compact, saying the university disagreed with a number of the principles laid out in the document, including policies that would limit freedom of expression and institutional independence.
MIT President Says ‘We Cannot Support’ Trump’s Compact
The institution’s president, Sally Kornbluth, wrote: The proposal “is inconsistent with our core belief that scientific funding should be based on scientific merit alone.”
chroni.cl
October 10, 2025 at 3:51 PM
MIT President Kornbluth announced on Friday the university “cannot support” Trump’s compact, saying the university disagreed with a number of the principles laid out in the document, including policies that would limit freedom of expression and institutional independence.
Reposted by Marieke van Ham
📣 yEFIS Career Fridays start next week!
Your PhD opens more doors than you think — join our 5-week series and hear from immunology & life science PhDs who built amazing careers outside academia.
✨ Learn what they do, what got them there & ask your questions live!
Your PhD opens more doors than you think — join our 5-week series and hear from immunology & life science PhDs who built amazing careers outside academia.
✨ Learn what they do, what got them there & ask your questions live!
October 9, 2025 at 8:00 AM
📣 yEFIS Career Fridays start next week!
Your PhD opens more doors than you think — join our 5-week series and hear from immunology & life science PhDs who built amazing careers outside academia.
✨ Learn what they do, what got them there & ask your questions live!
Your PhD opens more doors than you think — join our 5-week series and hear from immunology & life science PhDs who built amazing careers outside academia.
✨ Learn what they do, what got them there & ask your questions live!
Reposted by Marieke van Ham
Your immune system attacks thousands of invaders every day. How?
Three scientists discovered “regulatory T cells” that act like “security guards” that keep our immune system in check... and were awarded the 2025 Nobel Prize for it.
Read more about their incredible discovery: bit.ly/4o9s4zh
Three scientists discovered “regulatory T cells” that act like “security guards” that keep our immune system in check... and were awarded the 2025 Nobel Prize for it.
Read more about their incredible discovery: bit.ly/4o9s4zh
Nobel prize awarded for discovery of immune system’s ‘security guards'
Nobel prize awarded for discovery of immune system’s ‘security guards’.
bit.ly
October 9, 2025 at 6:00 AM
Your immune system attacks thousands of invaders every day. How?
Three scientists discovered “regulatory T cells” that act like “security guards” that keep our immune system in check... and were awarded the 2025 Nobel Prize for it.
Read more about their incredible discovery: bit.ly/4o9s4zh
Three scientists discovered “regulatory T cells” that act like “security guards” that keep our immune system in check... and were awarded the 2025 Nobel Prize for it.
Read more about their incredible discovery: bit.ly/4o9s4zh
Reposted by Marieke van Ham
🚀 Join the EACR – yEHA – yEFIS Webinar on CAR T-cells!
📅 19 Nov 2025 | 14:00–15:30 CEST
🎙️ Speakers:
• Dr. Sonia Guedan
• Dr. med. David Stahl
• Dr. med. Tobias Weiss
🔗 Register now: us02web.zoom.us/webinar/regi...
@helloeacr.bsky.social
📅 19 Nov 2025 | 14:00–15:30 CEST
🎙️ Speakers:
• Dr. Sonia Guedan
• Dr. med. David Stahl
• Dr. med. Tobias Weiss
🔗 Register now: us02web.zoom.us/webinar/regi...
@helloeacr.bsky.social
October 7, 2025 at 12:01 PM
🚀 Join the EACR – yEHA – yEFIS Webinar on CAR T-cells!
📅 19 Nov 2025 | 14:00–15:30 CEST
🎙️ Speakers:
• Dr. Sonia Guedan
• Dr. med. David Stahl
• Dr. med. Tobias Weiss
🔗 Register now: us02web.zoom.us/webinar/regi...
@helloeacr.bsky.social
📅 19 Nov 2025 | 14:00–15:30 CEST
🎙️ Speakers:
• Dr. Sonia Guedan
• Dr. med. David Stahl
• Dr. med. Tobias Weiss
🔗 Register now: us02web.zoom.us/webinar/regi...
@helloeacr.bsky.social