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Arnaud Chiolero MD PhD

@swissepi.bsky.social
163 followers 177 following 56 posts

Population Health Scientist Epidemiologist | Head of the Population Health Laboratory projects.unifr.ch/pophealthlab | 🇨🇭 UNIFR & 🇨🇦 McGill #lifecourse #epidemiology #surveillance #monitoring #cancer

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Arnaud Chiolero MD PhD @swissepi.bsky.social · 07/03/2026
Near Lausanne, March 2026 #Switzerland 🇨🇭
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 14/12/2025
"Over the past few years, the rise of anti-science and anti-vaccine rhetoric has fundamentally changed the relationship between clinicians and patients. It has made routine preventive care feel like walking into an ideological minefield." #PopHealthLab #evidence www.statnews.com/2025/12/10/a...
statnews.com
Rise of anti-science rhetoric has fundamentally changed the relationship between doctors and patients
“The rise of anti-science and anti-vaccine rhetoric has fundamentally changed the relationship between clinicians and patients.”
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Our World in Data @ourworldindata.org · 06/11/2025
🔍 Introducing our new, more powerful search! → ourworldindata.org/search With such a rich publication—nearly 14,000 charts and 100s of articles on 120+ topics—it can be hard to find what matters to you. Now, finding what you’re looking for, or discovering something new, has never been easier.
Image of new Our World in Data search page
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 25/10/2025
Fall 2025 in Switzerland🇨🇭 waiting for Christmas 🎅
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Peter Tennant @pwgtennant.bsky.social · 24/09/2025
Had a fantastic few days in Oslo with @robertwplatt.bsky.social, @je-schwarze.bsky.social, and colleagues (plus @jdwilko.bsky.social online!) discussing how to do better reproductive research!
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Dr. Tom Frieden @drtomfrieden.bsky.social · 24/09/2025
Pre-order your copy here:
mitpress.mit.edu
The Formula for Better Health
In The Formula for Better Health, Tom Frieden—named “the most influential leader in American public health since C. Everett Koop” by former...
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Pure Science @purescience.news · 09/09/2025
Science is under siege from weaponised disinformation – posing a threat to human civilisation | Michael Mann and Peter Hotez #Science #Culture #Disinformation #ScienceCommunication #PublicTrustInScience
purescience.news
Science is under siege from weaponised disinformation – posing a threat to human civilisation | Michael Mann and Peter Hotez
From Covid misinformation to climate denialism, understanding the divergent paths of Australia and the US can help us fight the powerful forces that threaten our world As two scientists who lived through...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 08/09/2025
Kennedy is wrong, for sure, but how to resist⁉️ "To uphold a truly evidence-based public health, we must re-enchant and reinforce independent scientific institutions capable of generating valid expertise grounded in population health sciences." #PopHealthLab www.bmj.com/content/390/...
bmj.com
Reinforce Population Health Sciences for Evidence-Based Public Health
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 17/08/2025
www.the-scientist.com/an-nih-revie...
the-scientist.com
An NIH Reviewer Offers Grant-Writing Tips
Although securing grants in a competitive environment is challenging, researchers can ensure they put their best foot forward by following a few simple tips.
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Giles Wilkes @gilesyb.bsky.social · 11/07/2025
Sitting here bleary after another poor night's sleep, disinclined to engage in a day of cognitive effort, this chart from @jburnmurdoch.ft.com really strikes home on.ft.com/4eFZG4l
Shows death rates in US and eu cities by temperature, air con being the decisive factor
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Our World in Data @ourworldindata.org · 10/12/2024
The world is awful. The world is much better. The world can be much better. All three statements are true at the same time. Understanding this is key to solving big global problems. We believe data & research can help us understand both the problems we face & the progress that’s possible. 🧵
A chart in three parts showing data on child mortality to make the points that "The world is awful. The world is much better. The world can be much better. All three statements are true at the same time."
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Our World in Data @ourworldindata.org · 11/08/2025
✍️ New article: “$3 a day: A new poverty line has shifted the World Bank’s data on extreme poverty. What changed, and why?” 🧵
A line chart showing the global number of people living in extreme poverty. Extreme poverty is defined as living below the International Poverty Line (IPL), which is $2.15 per day in 2017 prices (shown as a red line on the chart) and $3 per day in 2021 prices (shown as a blue line).

125 million people who would not have been counted as extremely poor before June 2025 (when the IPL was raised to $3 per day) are now included.

This data is adjusted for inflation and for differences in living costs between countries. The data source is the World Bank (2024 and 2025). The chart is CC BY Our World in Data.
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 12/08/2025
Near #Lausanne 🇨🇭 August 2025
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ᴄʜᴀʀʟᴇʏ★ᴘɪʀᴏᴛʜ @charlespiroth.bsky.social · 06/08/2025
The Thinker. Los Angeles, 1930 Hiromu Kira
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 08/08/2025
"Pamuk gives a compelling philosophical argument for increasing the institutions that are at the nexus of citizen civil society and the expert-led decision-making processes of government" oxfordpoliticalreview.com/2024/03/24/z...
oxfordpoliticalreview.com
Zeynep Pamuk on Politics and Expertise: ‘It’s not just a matter of fixing the communication and educating the people’ | ayzwang | Oxford Political Review
Antoine Levie speaks to Zeynep Pamuk, Associate Professor in Contemporary Political Theory at Oxford University and Professorial Fellow at Nuffield College, about her recent book ‘Politics and Experti...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 05/08/2025
"Continuously expanding disease criteria can reduce underdiagnosis and increase appropriate care, but often risk overdiagnosis, resulting in overtreatment and low-value care, ultimately threatening health care sustainability." #PopHealthLab jamanetwork.com/journals/jam...
jamanetwork.com
The Impact of Definitions of Disease on Overdiagnosis
This Viewpoint discusses the global challenge of defining diseases and the need to balance broader access to medical treatment with avoidance of harmful medicaliziation and inefficient resource use.
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JAMA @jama.com · 02/08/2025
US children's health has worsened from 2007 to 2023 across various indicators, including mortality, chronic conditions, and mental health. ja.ma/4lZnRxG #MedSky #PedSky
Figure 1. All-Cause Mortality Rates per 100 000 in the US vs OECD18 for <1-Year-Old Infants and 1- to 19-Year-Old Individuals, 2007-2022
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Peter Tennant @pwgtennant.bsky.social · 24/07/2025
This will be: * the first European Congress of Epidemiology since Cork, Ireland 2019 * the 70th conference of the Society for Social Medicine & Population Health * the 70th anniversary of the first meeting of the International Epidemiological Association So a real celebration of Epi in Europe!
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Peter Tennant @pwgtennant.bsky.social · 24/07/2025
SAVE THE DATE: The 2026 IEA European Congress of Epidemiology and 70th @socsocmed.bsky.social Annual Conference will take place in London, UK on 8th-11th September 2026! #EpiSky #EuroEpi2026
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 24/07/2025
#epidemiology Save the date 💪😘 @pwgtennant.bsky.social @societyforepi.bsky.social @robertwplatt.bsky.social @harvardepi.bsky.social @yalesph.bsky.social
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Peter Tennant @pwgtennant.bsky.social · 24/07/2025
PLEASE SHARE THROUGH YOUR NETWORKS!!! ⬆️ @mendelrandom.bsky.social @swissepi.bsky.social @christinadahm.bsky.social @ideberitlange.bsky.social @jlrohmann.bsky.social @jeremylabrecque.bsky.social @nataliaortega.bsky.social @statsepi.bsky.social @janetcade.bsky.social @robertwplatt.bsky.social
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 12/05/2025
Bordeaux Mai 2025
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 02/05/2025
Risk prediction is made at a group level - not at an individual level 🤔 It seems evident but the confusion is pervasive 😱 and stems from the conflation between risk and disease #PopHealthLab www.bmj.com/content/389/...
bmj.com
Confusion between population risk prediction and individual disease
Riley and colleagues discuss the importance of presenting the uncertainty around risk estimates provided by clinical prediction models.1 They describe how uncertainty and bias can be caused by poor me...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 30/04/2025
#Cancer screening ▶️ a whole-population or a risk-based approach⁉️ If risk-based, can you convince the "low-risk" strata to do less⁉️ #prevention #PopHealthLab @thelancetph.bsky.social @drotte.medsky.social @cancerresearchuk.org @vickersbiostats.bsky.social www.thelancet.com/journals/lan...
thelancet.com
Screen no matter the risk?
The systematic review by Naomi Tan and colleagues published in The Lancet Public Health (February issue) on the perceptions of personalised risk-based cancer screening reflects a growing trend in the ...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 24/04/2025
Easter 2025 in Lugano #Switzerland
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alfredomorabia.bsky.social @alfredomorabia.bsky.social · 20/04/2025
#SoonInAJPH: "Building Community Research Capacity to Address Cardiovascular Health Disparities" An adapted curriculum significantly boosts community research capacity and participation in cardiovascular health initiatives.
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 22/04/2025
Three thinks to do in quantitative population health studies (1) set a theoretical estimand, (2) link it to an empirical estimand, and (3) learn from data. You want to know more⁉️ Read this fantastic review #PopHealthLab bstewart.scholar.princeton.edu/publications...
bstewart.scholar.princeton.edu
What is Your Estimand? Defining the Target Quantity Connects Statistical Evidence to Theory | Brandon Stewart
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Eric Topol @erictopol.bsky.social · 20/04/2025
A frontal assault graph from www.nytimes.com/2025/04/18/u... editorial @postopinions.bsky.social www.washingtonpost.com/opinions/202...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 18/04/2025
Easter 2025, Pully, Switzerland 🇨🇭
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 12/04/2025
April 2025 in Switzerland 🇨🇭
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 11/04/2025
Public health surveillance or monitoring⁉️ What is clear is that we need both more than ever for evidence-based decision💪 #PopHealthLab @amjpublichealth.bsky.social @alfredomorabia.bsky.social @eupha.bsky.social @drtomfrieden.bsky.social ajph.aphapublications.org/doi/abs/10.2...
ajph.aphapublications.org
Monitoring Is Not Enough | AJPH | Vol. 115 Issue 5
American Journal of Public Health (AJPH) from the American Public Health Association (APHA)
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 04/04/2025
"At the heart of the problem is the confusion between public health surveillance and health data science" #PopHealthLab @alfredomorabia.bsky.social ajph.aphapublications.org/doi/10.2105/...
ajph.aphapublications.org
Data Are Not Enough to Reimagine Public Health | AJPH | Vol. 110 Issue 11
American Journal of Public Health (AJPH) from the American Public Health Association (APHA)
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 02/04/2025
"Public health is often invisible — until it fails. Without these programs, there will be more outbreaks, more tobacco-related illnesses, and more Americans dying unnecessarily." 🙈🤯 @drtomfrieden.bsky.social @alfredomorabia.bsky.social #PopHealthLab www.statnews.com/2025/04/01/c...
statnews.com
Former CDC Director Tom Frieden: Cuts to the agency will cost American lives and dollars
The Office on Smoking and Health, the Environmental Health Laboratory, CDC Communications offices — the gutting of these teams will make America sicker, writes former CDC Director Tom Frieden.
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 26/03/2025
"Globally, children’s Na intake was too high, while K intake was too low. Data were lacking in many countries. Interventions are needed to reduce Na and increase K from childhood, and monitoring should be improved" @drtomfrieden.bsky.social #PopHealthLab nutrition.bmj.com/content/earl...
nutrition.bmj.com
Worldwide and time trends in sodium and potassium intakes in children and adolescents: a systematic review and meta-analysis
Background High sodium (Na) and low potassium (K) intakes in childhood have health effects across the life course. The objective was to estimate global, regional and national Na and K intakes in child...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 23/03/2025
Major improvements in population are too often underappreciated 🙈 #progress Check here the major decline in the age-specific prevalence of dementia ✅️💪 #PopHealthLab @drtomfrieden.bsky.social @cwolfs1.bsky.social @eupha.bsky.social @alfredomorabia.bsky.social
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Vilja Oired @oired.bsky.social · 12/03/2025
This aligns with the clinical picture and not just for dementia: a 75-year-old today is in the same shape as a 65-year-old 30–40 years ago. Possible reasons: Less smoking? Less physical labor? Fewer severe infections (vaccination/antibiotics)? Cholesterol-lowering drugs? Less pollution? …
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 21/03/2025
Prevalence induced concept change explains why "people whose job is to find and eliminate problems in the world often cannot tell when their work is done" 🙈 Key issue in public health‼️ #PopHealthLab #PopulationHealth #surveillance www.science.org/doi/10.1126/...
science.org
Prevalence-induced concept change in human judgment
Social problems may seem intractable in part because reductions in their prevalence lead people to notice more of them.
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 18/03/2025
How to predict risk⁉️ Well, do your best but acknowledge😎 uncertainties and remember that what you know at a group level is not bluntly applicable to one individual @bmj.com @societyforepi.bsky.social @eupha.bsky.social @richarddriley.bsky.social ✅️ #PopHealthLab www.bmj.com/content/388/...
bmj.com
Confusion between population-risk prediction and individual disease
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 15/03/2025
How to prevent cardiovascular diseases⁉️ "Pharmacist care is one key element of the solution to the global burden of hypertension and cardiovascular diseases"✅️ @drtomfrieden.bsky.social @eupha.bsky.social @cochranehtn.bsky.social @amjhypertension.bsky.social www.frontiersin.org/journals/car...
frontiersin.org
Frontiers | Pharmacists delivering hypertension care services: a systematic review and meta-analysis of randomized controlled trials
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Voices for Vaccines @voices4vaccines.bsky.social · 09/03/2025
"She would say that her brain felt as if a part of it was missing and asked me to check her skull for indentations." The lasting trauma of measles encephalitis. www.voicesforvaccines.org/measles-and-...
voicesforvaccines.org
Measles and My Sister
At the end of February 1960, my sister, a precocious, healthy child was halfway through the fourth grade in Rockland County when she contracted measles from one of her classmates who lived right down…
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Elizabeth Stokoe @lizstokoe.bsky.social · 08/03/2025
"Words do have power. Words are events, they do things, change things." "We can’t restructure our society without restructuring language. One reflects the other." (Ursula K. Le Guin, in 'The Wave in the Mind' and in Jonathan White's 'Talking on the Water.')
A screenshot from New York Times with the headline The Words Federal Agencies are Removing From their sites under Trump, which run from 'activism' to 'victims'
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 07/03/2025
Read, learn, and teach because "rational thinking is the real driving force that underlies the institutional and technological changes [...] leading eventually to population-wide health improvement" #PopHealthLab @alfredomorabia.bsky.social @eupha.bsky.social pmc.ncbi.nlm.nih.gov/articles/PMC...
pmc.ncbi.nlm.nih.gov
Yes, We Can—A Cure for Public Health Catastrophism
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Agence Science-Presse @sciencepresse.qc.ca · 05/03/2025
Interruption de l'aide américaine au développement : 18 millions de cas de malaria supplémentaires, causant plus de 160 000 décès; 200 000 enfants paralysés à cause de la polio; un million d’enfants sans traitements pour sévère malnutrition.
sciencepresse.qc.ca
Aide internationale: les morts causés par le retrait des États-Unis
18 millions de cas de malaria supplémentaires par année, causant plus de 160 000 décès. Quelque 200 000 enfants paralysés chaque année à cause de la polio. Un million d’enfants sans traitements pour s...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 25/02/2025
Life course #epidemiology has changed the way we understand the causes of chronic diseases 😎 Do you want to know more⁉️ Read this review in @thelancetph.bsky.social @rosevdlinden.bsky.social @stephane-cullati.bsky.social @cristianmeli.bsky.social #PopHealthLab www.thelancet.com/journals/lan...
thelancet.com
Life course epidemiology and public health
Life course epidemiology aims to study the effect of exposures on health outcomes across the life course from a social, behavioural, and biological perspective. In this Review, we describe how life co...
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alfredomorabia.bsky.social @alfredomorabia.bsky.social · 20/02/2025
#SoonInAJPH "Using surveillance data to estimate of infectious disease burden: opportunities and challenges" The utility of infectious disease models can be increased through enhanced sharing of both data and code used to develop these models.
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Kai Kupferschmidt @kakape.bsky.social · 02/03/2025
NEW: The Minerva Research Initiative, established by the Pentagon to fund social science relevant to national security, is being gutted. Dozens of researchers studying threats from extremist groups, misinformation or climate change have received notices that their grants are being terminated. 🧪
science.org
Pentagon guts national security program that harnessed social science
Dozens of U.S. academics lose grants from Minerva program for studies related to terrorism, drug trafficking, and other threats
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 25/02/2025
Life course #epidemiology has changed the way we understand the causes of chronic diseases 😎 Do you want to know more⁉️ Read this review in @thelancetph.bsky.social @rosevdlinden.bsky.social @stephane-cullati.bsky.social @cristianmeli.bsky.social #PopHealthLab www.thelancet.com/journals/lan...
thelancet.com
Life course epidemiology and public health
Life course epidemiology aims to study the effect of exposures on health outcomes across the life course from a social, behavioural, and biological perspective. In this Review, we describe how life co...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 22/02/2025
Very informative 👍 report on our healthcare systems 🇨🇭🇨🇦🇪🇺 #PROMs #qualityofcare #VBHC #PopHealthLab #monitoring #surveillance @stephane-cullati.bsky.social @eupha.bsky.social www.oecd.org/en/publicati...
oecd.org
Does Healthcare Deliver?
For far too long, we have lacked meaningful insights into people’s experiences of healthcare and their health outcomes. The Patient-Reported Indicator Surveys (PaRIS) is a groundbreaking OECD initiati...
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 19/02/2025
"Quantitative causal inference in social epidemiology is an opportunity to do better science that matters, a win-win for both fields." #PopHealthLab @miguelhernan.org @epiellie.bsky.social @pwgtennant.bsky.social @cristianmeli.bsky.social @societyforepi.bsky.social academic.oup.com/aje/article/...
academic.oup.com
Win-Win: Reconciling Social Epidemiology and Causal Inference
Abstract. Social epidemiology is concerned with the health effects of forces that are “above the skin.” Although causal inference should be a key goal for
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Arnaud Chiolero MD PhD @swissepi.bsky.social · 19/02/2025
"The true value of academic health research lies in the ineffable foundational role it plays in enabling a country to thrive and grow" @drtomfrieden.bsky.social @societyforepi.bsky.social @eupha.bsky.social #PopHealthLab #PopulationHealth #PublicHealth jamanetwork.com/journals/jam...
jamanetwork.com
The Value of Academic Health Research
In the past month, the academic health research community in the US has been rocked by the new administration’s efforts to curtail health research expenditures. In the form of “Supplemental Guidance t...
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