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Joël Mossong

@joelmossong.bsky.social
952 followers 343 following 75 posts

Epidemiologist in a small country.

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Reposted by Joël Mossong
European Centre for Disease Prevention and Control @ecdc.europa.eu · 16/09/2026
𝗖𝗼𝘂𝗹𝗱 𝘆𝗼𝘂 𝗯𝗲 𝗼𝗻𝗲 𝗼𝗳 𝗘𝘂𝗿𝗼𝗽𝗲’𝘀 𝗻𝗲𝘅𝘁 𝗱𝗶𝘀𝗲𝗮𝘀𝗲 𝗱𝗲𝘁𝗲𝗰𝘁𝗶𝘃𝗲𝘀? Applications are now open for the 2027 cohort of the #ECDC Fellowship Programme, offering two paths: 🔎 #EPIET – field epidemiology 🧫 #EUPHEM – public health microbiology. Check the criteria and apply before 𝟮𝟲 𝗢𝗰𝘁𝗼𝗯𝗲𝗿 𝟮𝟬𝟮𝟲 𝗮𝘁 𝟮𝟰:𝟬𝟬 𝗖𝗘𝗧 ⬇️⬇️⬇️
bit.ly
Call for application for ECDC Fellowship Programme EPIET and EUPHEM paths, EU-track, Cohort 2027
The goal of the ECDC fellowship programme is to develop an European network of public health epidemiologists that share concepts and methods.
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Reposted by Joël Mossong
European Centre for Disease Prevention and Control @ecdc.europa.eu · 16/09/2026
If you have experience in public health, applied epidemiology or microbiology and want to take the next step towards becoming a disease detective, explore the EPIET and EUPHEM paths. 📅 Applications close: 𝟮𝟲 𝗢𝗰𝘁𝗼𝗯𝗲𝗿 𝟮𝟬𝟮𝟲 𝗮𝘁 𝟮𝟰:𝟬𝟬 𝗖𝗘𝗧 🔗 Apply and check the full eligibility criteria: bit.ly/4xvvnVL
bit.ly
Call for application for ECDC Fellowship Programme EPIET and EUPHEM paths, EU-track, Cohort 2027
The goal of the ECDC fellowship programme is to develop an European network of public health epidemiologists that share concepts and methods.
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Reposted by Joël Mossong
Eurosurveillance journal @eurosurveillance.org · 24/09/2026
#IDSky #EpiSky #MedSky #MicroSky 🛟🧪 Help us shape #Europe's #PublicHealth response & setting the #scientific direction of our publisher @ecdc.europa.eu as the new ECDC Chief Scientist In this role, you will also host the Eurosurveillance editorial office in your Unit Apply by 30 Sept 2026 ⤵️
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Reposted by Joël Mossong
Eurosurveillance journal @eurosurveillance.org · 24/09/2026
Our new issue features an outbreak report from #France on a nationwide #outbreak of #Salmonella Enteritidis linked to #pumpkin seeds So far, 81 patients have been notified & cases are still being identified. Traceback continues incl for export 🎃 bit.ly/EUS3138 #EpiSky #IDSky #FoodSafety #MedSky🧪
Table of content issue 38 in 2026:

Rapid communication
Nationwide outbreak of Salmonella Enteritidis linked to consumption of pumpkin seeds, France, 2026

Surveillance
Patterns in the dynamics of respiratory viruses after the COVID-19 pandemic: an observational, retrospective study using sentinel surveillance network data, Catalonia, 2022 to 2025

Increase in congenital syphilis in the European Union and European Economic Area, 2015 to 2024 – time to scale-up public health responses
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Reposted by Joël Mossong
ESCAIDE @escaide.eu · 09/09/2026
You could still get the chance to present your research at ESCAIDE 2026! The call for late breakers is now open, and the deadline for submissions is 23 September 2026. We welcome abstracts in all areas applied to infectious disease and public health. Learn more: www.escaide.eu/en/abstracts...
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Eurosurveillance journal @eurosurveillance.org · 04/09/2026
As @ecdc.europa.eu Chief Scientist, you will host the Eurosurveillance editorial office Help ensure the journal's editorial independence, serving #PublicHealth with high quality, #OpenAccess information & data relevant for timely action 🗓️ Application deadline: 30 Sept 26 #IDSky #EpiSky #MedSky 🧪🧫
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Reposted by Joël Mossong
Onisillos @onisillos.bsky.social · 06/08/2026
"Elon Musk is, like a lot of LLMs, frequently wrong and never in doubt." garymarcus.substack.com/p/elon-musks...
garymarcus.substack.com
Elon Musk’s preposterous and possibly harmful claim about robotic surgery
Some predictions are off. This one is way off.
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Reposted by Joël Mossong
Carl T. Bergstrom @carlbergstrom.com · 04/07/2026
1. A bit of evolutionary biology. I'm really intrigued by a new perspective piece from Steve Frank that explores connections between how natural selection creates systems that generalize and recent work in machine learning about the surprising capabilities of massively overparameterized systems.
academic.oup.com
Generalization as the great leap in evolvability: insights from machine learning
Abstract. Natural selection encodes learned information in the genome. Learned solutions may be tuned specifically to past challenges, failing in altered e
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Reposted by Joël Mossong
Nicolas Berrod @nicolasberrod.bsky.social · 24/06/2026
❗ Un cas d'#Ebola a été recensé en France, un médecin humanitaire de retour de mission en République démocratique du Congo. Il est isolé et hospitalisé dans un état "stable", ses éventuels cas contact devront s'isoler à domicile pendant 3 semaines.
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Michael Okun @michael-okun.bsky.social · 10/06/2026
I’ve officially resigned as Associate Editor for Frontiers in Systems Neuroscience. It used to be a reputable journal, but became a case study in how forced automation destroys academic integrity. 👇
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Kai Kupferschmidt @kakape.bsky.social · 10/06/2026
In the end, researchers were left with a list of 14 pathogens that they are sharing “to help state health departments say, ‘OK, what are the priority pathogens we should keep on our radar?’” @alexvespi.bsky.social says. My @science.org story on a preprint assessing outbreak risks at the World Cup.🧪
science.org
Will the World Cup kick off disease outbreaks?
Don’t expect pathogens to steal the show, says research group that studied the risk of visiting fans spreading infections
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Reposted by Joël Mossong
Kai Kupferschmidt @kakape.bsky.social · 02/06/2026
“But while the need for better tests has been clear for years, there has been little investment to develop them because there is no high-income market, said Sonjelle Shilton, who works [] for the aid group Doctors Without Borders.” Great story on Ebola diagnostics in current outbreak 🧪 #giftlink
nytimes.com
Only the Right Tests Can Stop This Ebola Outbreak. Congo Has Hardly Any.
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Reposted by Joël Mossong
Epidemiology & Infection @epidemio-infect.bsky.social · 08/05/2026
🎉 This year, we’re celebrating 125 years of Epidemiology & Infection! 🏛️🔬 Curious to know why the journal has endured for more than a century? 🎥 Watch our anniversary video to find out: 👉 cup.org/48DCdiD
The image features text reading "Celebrating 125 Years of Epidemiology & Infection" with a call for blog posts. It includes stylized illustrations of a microscope, virus, and clipboard on a dark blue background.
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Chris Hanretty @chanret.bsky.social · 26/05/2026
On the year's hottest day, a thread on why this infographic misleads (1/n)
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Kristian G. Andersen @kgandersen.bsky.social · 23/05/2026
The Proximal Origin of the MV Hondius Andes virus outbreak. virological.org/t/potential-...
virological.org
Potential geographical and ecological origin of the MV Hondius Andes virus outbreak
The recent outbreak aboard the MV Hondius caused by Andes virus raises two key questions [1]: (i) where do the outbreak genomes cluster geographically, and (ii) how can the phylogenetic signal be reco...
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Reposted by Joël Mossong
Adam Kucharski @adamjkucharski.bsky.social · 21/05/2026
There's been some high profile criticism of test-negative method for vaccine effectiveness, as well as counter-criticism. Yet remarkably little in media saying what the method actually does, why it's useful, what the limitations are, and how we can improve it. Great that John Drake wrote this:
forbes.com
Jay Bhattacharya Called Test-Negative Study Design ‘Crap.’ Here’s How We Know Whether Vaccines Measured With It Are Effective
Jay Bhattacharya dismissed the test-negative design as 'crap.' The biostatistics literature tells a different story.
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Reposted by Joël Mossong
Ben Harrap @bharrap.bsky.social · 21/05/2026
Someone brought up variable naming and it reminded me of how much fun I had writing this blog post #rstats #databs benharrap.com/post/2025-03...
benharrap.com
What makes a good variable naming convention – Ben Harrap
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Charlotte Houldcroft @virologyhouldcroft.bsky.social · 20/05/2026
We do not currently have a vaccine for Bundibugyo ebolavirus. BUT! There are vaccine candidates that have ben tested in animals and could go forward more quickly to human trials. Eg VesiculoVax doi.org/10.1093/infd... and another VSV-based vaccine journals.plos.org/plosntds/art...
doi.org
A Highly Attenuated Panfilovirus VesiculoVax Vaccine Rapidly Protects Nonhuman Primates Against Marburg Virus and 3 Species of Ebola Virus
AbstractBackground. The family Filoviridae consists of several virus members known to cause significant mortality and disease in humans. Among these, Ebola
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Reposted by Joël Mossong
Marc Veldhoen @marcveld.bsky.social · 16/05/2026
A Canadian passenger from the cruise ship Hondius has likely tested positive for hantavirus, a health official told CBC. The patient, with mild symptoms, was hospitalized and is currently in stable condition. Again, this concerns a passenger.
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Billy Quilty @bquilty.bsky.social · 13/05/2026
How have UK social contact patterns changed post-pandemic? How assortative are they by age, ethnicity, and socioeconomic status? Pleased to share our new @plosmedicine.org paper, jointly led by @lucygoodfellow.bsky.social and myself, with @kevinvzandvoort.bsky.social and John Edmunds. #IDSky
Seven heatmaps displaying social contact matrices, stratified by age, setting, ethnicity, and socioeconomic status. Colour gradients indicate the mean number of contacts, with lighter yellows and greens representing higher values and dark purples representing lower values.

Panel A shows total contacts by participant and contact age group, highlighting strong mixing between similar ages along the diagonal, and secondary parallel bands representing parent-child interactions.

Panels B through E break down these age contacts by setting. Home displays distinct family and intergenerational patterns, Work shows mixing primarily among working-age adults, School shows highly intense mixing restricted to school-age children, and Other settings display general age assortativity.

Panel F illustrates total contacts by ethnic group. It reveals strong assortative mixing, with the highest mean contact numbers occurring between individuals of the same ethnicity, specifically within White, Black, and Asian demographic groups.

Panel G displays total contacts by NS-SEC socioeconomic classification and life stage. This matrix demonstrates assortative mixing within similar occupational classes, alongside a notably high concentration of contacts among participants and contacts classified as under 17.
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Reposted by Joël Mossong
Billy Quilty @bquilty.bsky.social · 14/05/2026
A great Perspective piece from @joelmossong.bsky.social on the evolution of social contact surveys, from the POLYMOD study he led in 2008 (which became the template for all others), to CoMix during the pandemic, and now on to Reconnect: journals.plos.org/plosmedicine...
journals.plos.org
On the evolution of the company we keep: Implications for infectious disease modeling
In this Perspective, Joël Mossong discusses the importance of understanding social contacts and how they have evolved for infectious disease modeling, and the need to factor in additional consideratio...
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Reposted by Joël Mossong
Bill Hanage @billhanage.bsky.social · 13/05/2026
Bringing some of my thoughts together. And explaining why hantavirus is emphatically not COVID news.harvard.edu/gazette/stor...
news.harvard.edu
Hantavirus likely to be fully contained but may take time — Harvard Gazette
The disease is much deadlier than COVID, but much harder to spread.
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Kai Kupferschmidt @kakape.bsky.social · 12/05/2026
"WHO’s assessment continues to be that the risk to health globally is low. So far, 11 cases have been reported, including 3 deaths. All 11 cases are among passengers or crew on the ship. 9 of the 11 have been confirmed as Andes virus, and the other two are probable", says @drtedros.who.int.
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WHO @who.int · 11/05/2026
Join our live update on #hantavirus with Olivier Le Polain, Unit Head, Epidemiology & Analytics for Response, TODAY at 17.00 CEST [GMT+2] It will be livestreamed on WHO's X, Facebook, LinkedIn and YouTube
Live update on hantavirus with Olivier Le Polain, Unit Head, Epidemiology & Analytics for Response, today at 17.00 CEST [GMT+2]
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Nicolas Berrod @nicolasberrod.bsky.social · 11/05/2026
🔴 La passagère française symptomatique et rapatriée hier est positive à l'#hantavirus, annonce Stéphanie Rist sur France Inter. Son état de santé "s'est dégradé" dans la nuit, elle est hospitalisée à Bichat.
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Kai Kupferschmidt @kakape.bsky.social · 08/05/2026
After 15 years of reporting on infectious disease outbreaks, what continues to fascinate me about them is the challenge of making high-stakes decisions under uncertainty. The hantavirus outbreak on the MV Hondius is a perfect example My story in @science.org is here (and a thread to come): 🧪 #IDsky
science.org
What to do with the passengers on the cruise ship hit by hantavirus?
Past studies of Andes virus offer scant evidence on transmission risks, and have sparked debate
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Tedros Adhanom Ghebreyesus @drtedros.who.int · 07/05/2026
I am hosting a media briefing on #hantavirus today at 15:00h CEST. You can join and watch via @who.int and my social media channels across X, Facebook, LinkedIn and YouTube.
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Kai Kupferschmidt @kakape.bsky.social · 05/05/2026
I've spent yesterday and today talking to researchers across the globe trying to understand the hantavirus outbreak aboard the cruise ship MV Hondius. My story in @science.org is here (and some threaded thoughts coming): www.science.org/content/arti... 🧪 #IDsky
science.org
Cruise ship’s hantavirus outbreak puts researchers in uncharted territory
Questions about the culprit virus and its route of spread remain as health officials make plans for stranded passengers
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Kristian G. Andersen @kgandersen.bsky.social · 05/05/2026
Updates on the hantavirus situation from WHO (which we, beyond belief, are no longer part of). Seven suspected cases, three deaths. Case 1 boarded Apr 1, got sick Apr 6, died Apr 11. Likely Andes virus, given Argentina link. Consistent with infection before boarding. www.who.int/emergencies/...
who.int
Hantavirus cluster linked to cruise ship travel, Multi-country
On 2 May 2026, a cluster of passengers with severe respiratory illness aboard a cruise ship was reported to the World Health Organization. The ship is carrying 147 passengers and crew. As of 4 May 202...
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gostin.bsky.social @gostin.bsky.social · 04/05/2026
The hantavirus outbreak is a stress test for WHO's IHR. Cape Verde should allow disembarkation if it has capacity The IHR requires a risk assessment, and there is no risk to the local pop. This happened during COVID & it's why the IHR were amended. We haven't learned our lesson
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Joël Mossong @joelmossong.bsky.social · 05/05/2026
Not much information regarding lab results yet. I guess they meant pan-hantavirus PCR positive, rather than hantavirus positive.
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Jonas Schöley @jschoeley.com · 29/04/2026
demoscapes.org is a visual atlas of demographic surfaces hosted at @mpidr.bsky.social. It is also my passion project growing out of my 2016 human mortality database explorer. Did you publish something containing Lexis surfaces? Consider reaching out and having your work featured on the site.
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Joël Mossong @joelmossong.bsky.social · 24/04/2026
Similar to what happened in Europe: no #Covid19 summer wave in 2025, but not any winter epidemic 2025/26 either. Flu levels were also lower than previous season. erviss.org A major wave only to be expected if new variant with large number of mutations were to appear. Not on the horizon yet.
erviss.org
European Respiratory Virus Surveillance Summary
ERVISS provides a weekly integrated epidemiological summary for influenza, respiratory syncytial virus (RSV) and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) for the European Union/Eur...
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Kit Yates @kityates.bsky.social · 23/04/2026
Only a rise from $100 to $600 is a 500% rise, not a 600% rise. And when you drop the price back down from $600 to $100 that’s not a 600% reduction, that’s an 83.3% reduction.
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Jon Cohen @cohenjon.bsky.social · 14/04/2026
www.science.org/content/arti...
science.org
Rollout of powerful new HIV prevention tool in lower income countries gets a boost
Global Fund and U.S. government plan to make injectable lenacapavir available to 3 million people by 2028
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Alasdair Munro @apsmunro.bsky.social · 09/04/2026
Avoiding infections is good But some simply cannot be avoided - multiple exposures over the life course are inevitable In which case, when is the best time to get infected for the first time? 🤔
open.substack.com
What people get wrong about early life infections
The confusing reality behind the timing of childhood pathogen exposure
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John M. Drake @jdrakephd.bsky.social · 05/03/2026
(Potentially) unpopular opinion. Too long for BlueSky so please read on Substack. jdrakephd.substack.com/p/in-praise-...
jdrakephd.substack.com
In Praise of the AI-Drafted Email
I’m going to risk sounding contrarian: I like receiving AI-written emails.
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PlantEvolution 🌱🌾 @plantevolution.bsky.social · 31/03/2026
@forbes.com picking up the recent work by @carlbergstrom.com & Kevin Gross in @plosbiology.org on the future of peer review. www.forbes.com/sites/johndr...
forbes.com
The System That Decides What Science Gets Published Is Breaking Down
The peer review system that validates scientific research is trapped in a self-defeating cycle. A new mathematical model shows why—and what comes next.
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BK. Titanji @boghuma.bsky.social · 04/03/2026
This is a remarkable study. A simple sanitary pad could transform cervical cancer screening. Researchers enrolled 3,000+ women (age 20–54) & compared 2 approaches: Standard clinician-collected cervical HPV test HPV testing from menstrual blood collected on a sanitary pad www.bmj.com/content/392/...
bmj.com
Testing menstrual blood for human papillomavirus during cervical cancer screening in China: cross sectional population based study
Objective To compare the diagnostic accuracy of minipad collected menstrual blood versus clinician collected cervical samples to test for human papillomavirus (HPV) in the detection of cervical intrae...
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Joël Mossong @joelmossong.bsky.social · 27/02/2026
Great reminder why we need conferences.
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Dr Emma Hodcroft @firefoxx66.bsky.social · 23/02/2026
Every year I get to 're-live' the pandemic thanks to FB memories. Re-examining my posts with increasing time is always interesting. This one though - this one never fails to send a shiver down my spine. When do make a post like this? When are you sure enough? What if you regret it?
A screenshot of a FB memories post from 6 years ago today, 23 Feb 2020. Emma Hodcroft posts: "So yea. This is it. This is the post.
SARS-CoV-2 is extremely likely to become (if not already) pandemic. 
What's most important right now is getting a handle on how quickly it is spreading and where.
This means increasing testing and trying to slow the spread to buy time."
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STAT @statnews.com · 17/02/2026
COMP360 could be the first psilocybin-based medicine to win approval. www.statnews.com/2026/02/17/c...
statnews.com
Compass says its psilocybin drug helped patients with severe depression in two trials
COMP360 could be the first psilocybin-based medicine to win approval.
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Joël Mossong @joelmossong.bsky.social · 16/02/2026
The battle to save South America’s skull-crushing big cat www.economist.com/the-americas... From The Economist
economist.com
The battle to save South America’s skull-crushing big cat
Farmers and villagers realise that jaguars are worth more alive than dead
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Kai Kupferschmidt @kakape.bsky.social · 11/02/2026
Five years after the rollout of Covid-19 vaccines started, it seems the mystery of why the Astra-Zeneca and J&J vaccines led to a rare but deadly side effect of unusual blood clots and bleeding has finally been solved. 
 It's a fascinating case of molecular mimicry that may help make vaccine safer.🧪
science.org
Rare, dangerous side effects of some COVID-19 vaccines explained
“Groundbreaking” study uncovers why adenovirus-based shots caused life-threatening blood clots and bleeding in some people
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Joël Mossong @joelmossong.bsky.social · 02/02/2026
Reassuring to see no difference in clinical illness between clade Ib and IIb cases in the same population.
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Eurosurveillance journal @eurosurveillance.org · 27/01/2026
Indicating ongoing local transmission: between Oct-Nov 2025, 8 people were diagnosed with #mpox caused by infection with monkeypox virus (MPXV) clade Ib in the Netherlands - with now multiple #MPXV clades co-circulating in #Europe #IDsky #EpiSky #MedSky #MicroSky #STISky 🛟🧪 @flahless.bsky.social
eurosurveillance.org
Eurosurveillance | First detection and autochthonous transmission of monkeypox virus clade Ib in the Netherlands, October to November, 2025
In October–November 2025, eight autochthonous cases of monkeypox (MPXV) clade Ib virus infection were reported in the Netherlands. All cases were men who have sex with men aged 25–65; none required hospital admission or antiviral treatment. Phylogenetic analysis combined with contact tracing suggest multiple introductions or cryptic circulation with onwards transmission within the community. Highly related international sequences were identified dating back to August 2025, indicating sustained global community transmission of clade Ib outside the African continent.
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Helen Branswell 🇨🇦 @helenbranswell.bsky.social · 29/01/2026
People who oppose #vaccines often claim that doctors push them because they're paid to by Pharma or that vaccine administration is a big revenue source for doctors. The reality: Delivering vaccine puts an economic strain on many pediatric practices. www.statnews.com/2026/01/29/p...
statnews.com
Do pediatricians make large profits from vaccines?
Vaccine critics like to say that pediatricians profit from vaccines. This report found something very different.
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Bloomberg News @bloomberg.com · 22/01/2026
AI weather models are helping make forecasts more accurate for longer ranges than meteorologists have long thought possible.
bloom.bg
How AI Weather Models Are Making Better Forecasts
Google, Microsoft and Nvidia are among the names vying to make forecasts more accurate for longer.
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Thijs Kuiken @thijskuiken.bsky.social · 23/01/2026
First evidence in Europe of highly pathogenic avian influenza virus H5N1 infection in a dairy cow. Antibodies against H5N1 detected in a cow with mastitis and respiratory signs on a Dutch dairy farm at the end of December. A cat on that farm had died from H5N1. www.tweedekamer.nl/downloads/do...
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