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Raphaëlle K @raph-klitting.bsky.social · 17/09/2026

Deeply collaborative work 🙏 E. Frumence, @sdellicour.bsky.social, MC. Jaffar, @kylaserres.bsky.social, Y.i Shao, M. Vincent, M. Gill , @msuchard.bsky.social, @lemeylab.bsky.social , X. de Lamballerie (CHU Réunion, Inserm, IRD, Aix-Marseille Université, Université libre de Bruxelles, F.R.S. - FNRS)

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Raphaëlle K @raph-klitting.bsky.social · 17/09/2026

5) This last result indicates that the risk of a large resurgence on La Réunion is low due to population immunity. And this prediction proved accurate: only a handful of local cases were reported this year on the island despite sustained chikungunya virus circulation elsewhere in the Indian Ocean 😉

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Raphaëlle K @raph-klitting.bsky.social · 17/09/2026

4) Finally, we demonstrate that the gradual build-up of population immunity was, in theory, sufficient to push – on its own – the effective reproduction number below 1, bringing the outbreak to an end.

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Raphaëlle K @raph-klitting.bsky.social · 17/09/2026

3) We show that epidemic dynamics were associated with climatic conditions (temperature and precipitation, which shape mosquito density and activity), but that climate alone cannot account for the decline in transmission at the end of the epidemic.

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Raphaëlle K @raph-klitting.bsky.social · 17/09/2026

2) We find that virus spread was highly “intermixed”, with frequent movements between residential areas (even distant ones), driven by human mobility and population density. (see also a very nice animation by @sdellicour.bsky.social available here :https://github.com/sdellicour/chikungunya_reunion)

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Raphaëlle K @raph-klitting.bsky.social · 17/09/2026

A quick run-down of the main points: 1) We confirm that this second major circulation event most likely stemmed from a new single introduction, after more than ten years with no autochthonous cases reported on the island.

Results of the preliminary phylogenetic analysis

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Raphaëlle K @raph-klitting.bsky.social · 17/09/2026

We combined these viral genomes with environmental, and serological data to track how the virus evolved, spread, and eventually receded 🔎 🤓

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Raphaëlle K @raph-klitting.bsky.social · 17/09/2026

Analyses were led by @sdellicour.bsky.social and primary data was produced thanks to the massive efforts performed by E. Frumence & MC. Jaffar, with >3,000 time-stamped geo-referenced near-full chikungunya virus genomes, that is >5% of confirmed cases, an excellent sampling fraction 🧬👏

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Raphaëlle K @raph-klitting.bsky.social · 12/01/2026

Deeply collaborative work: E. Frumence, @sdellicour.bsky.social, MC. Jaffar, @kylaserres.bsky.social, Y.i Shao, M. Vincent, M. Gill , @msuchard.bsky.social, @lemeylab.bsky.social, X. de Lamballerie (CHU Réunion, Inserm, IRD, Aix-Marseille Université, Université libre de Bruxelles, F.R.S. - FNRS)

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Raphaëlle K @raph-klitting.bsky.social · 12/01/2026

>> Finally, we show that the population immunity resulting from both the current and the 2005-2006 epidemic is sufficient to explain the decrease in transmission rate leading to the end of the epidemic. 📉

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Raphaëlle K @raph-klitting.bsky.social · 12/01/2026

>> We find that virus dispersal events were on average more likely between geographically close locations with, however, frequent dispersal between distant residential areas, at least partly due to human mobility 🚗

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Raphaëlle K @raph-klitting.bsky.social · 12/01/2026

We analyse more than more than 3,000 time-stamped and geo-referenced near-full chikungunya genomes representing more than 5% of confirmed cases, to assess the epidemiological and dispersal dynamics of the virus. In brief 👇

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Raphaëlle K @raph-klitting.bsky.social · 12/01/2026

This second major outbreak stems from a new single introduction, after more than ten years with no autochthonous cases reported on the island.

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Raphaëlle K @raph-klitting.bsky.social · 12/01/2026

I am very glad to share the preprint for our latest study on the 2024-2025 chikungunya virus outbreak on Réunion island, with primary data produced thanks to the massive efforts performed by Marie-C Jaffar and Etienne Frumence and analyses led by Simon Dellicour. www.medrxiv.org/content/10.6...

medrxiv.org

Unravelling the epidemiological and dispersal dynamics of the 2024-2025 chikungunya virus outbreak on Reunion island

Reunion island just experienced a massive chikungunya virus outbreak in 2024-2025, with more than 54,000 confirmed cases. This is the second major chikungunya outbreak on the island, following the fir...

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Simon Dellicour @sdellicour.bsky.social · 12/01/2026

Our latest study dedicated to the massive 2024-2025 chikungunya virus outbreak on Réunion island is now available as a preprint on medRxiv: doi.org/10.64898/202.... With more than 54,000 confirmed cases this is the second major chikungunya outbreak on the island, following the 1° one 20 yrs ago. 1/9

doi.org

Unravelling the epidemiological and dispersal dynamics of the 2024-2025 chikungunya virus outbreak on Reunion island

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Simon Dellicour @sdellicour.bsky.social · 12/01/2026

This study is the result of a collaborative effort involving Etienne Frumence, @raph-klitting.bsky.social, @kylaserres.bsky.social, Yucai Shao, Muriel Vincent, Mandev Gill, @msuchard.bsky.social, @lemeylab.bsky.social, Xavier de Lamballerie, and Marie-Christine Jaffar-Bandjee. 9/9

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The Lambrechts Lab @lambrechtslab.bsky.social · 03/10/2025

🚨 New preprint alert! We have developed a targeted amplicon sequencing panel for Aedes aegypti. We believe it is a powerful and cost-effective tool for studying #mosquito #population #genetics. Curious how it matches up to WGS? Check out our preprint to find out! www.biorxiv.org/content/10.1...

biorxiv.org

A targeted amplicon sequencing panel for cost-effective high-throughput genotyping of Aedes aegypti

The mosquito Aedes aegypti is the primary vector for several medically significant arboviruses, including dengue, Zika, chikungunya, and yellow fever. Studying the genetic diversity of Ae. aegypti is ...

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Kristian G. Andersen @kgandersen.bsky.social · 26/07/2025

I don't know if this is just a reflection of the times that we find ourselves in, but our Research Programmer position received just under a thousand applications (984, to be precise!) in the first week of posting - we had to pull it down as a result... The Postdoc position is still open!

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CNRS Écologie & Environnement @cnrsecologie.bsky.social · 09/07/2025

@cnrsecologie.bsky.social regrette profondément l'adoption de cette loi à la vision court-termiste & ses conséquences graves sur l’environnement, qui méprise santé & bien-être de la population & le rôle des espèces sauvages dans la prod. agricole. La communauté scientifique n'a pas été entendue.

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Kristian G. Andersen @kgandersen.bsky.social · 15/07/2025

Are you looking for a Postdoc or Research Programmer position? Want to work as part of highly collaborative infectious disease programs that have direct relevance to global health? Well, we got you covered! Learn more 👇 andersen-lab.com/about/

andersen-lab.com

About - Andersen Lab

Learn more about the Andersen Lab, as well as jobs and career opportunities.

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Gael Cristofari @retrogenomics.bsky.social · 11/07/2025

🦟 Bioinformatics Research Scientist position open in my lab in Nice (FR) to study Aedes mosquito retrotransposons & their interactions with arboviruses collab w/ @salehlabparis.bsky.social & @lambrechtslab.bsky.social Apply: euraxess.ec.europa.eu/jobs/359830 Please boost! #ArboRetro #Bioinformatics

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Kai Kupferschmidt @kakape.bsky.social · 12/07/2025

“The studies targeted by NIH include both relatively low-risk, routine work and higher risk experimentation that is essential for developing new drugs and vaccines, several researchers told ScienceInsider” 🧪 #IDsky www.science.org/content/arti...

science.org

Exclusive: NIH suspends dozens of pathogen studies over ‘gain-of-function’ concerns

Trump executive order leads to pauses on U.S.-funded research into TB, influenza, COVID-19, and other diseases, dismaying some scientists

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Flo Débarre @flodebarre.eurosky.social · 28/06/2025

Le comité SAGO de l'OMS a publié un rapport de 78 pages sur l'origine de la pandémie de Covid-19. Il y a déjà beaucoup d'approximations et même de désinformation dessus. Pour un résumé honnête et instructif, lisez la référence journalistique sur le sujet, Jon Cohen dans Science

science.org

WHO panel favors natural origin of COVID-19 virus but decries missing evidence

New report doesn’t rule out that SARS-CoV-2 leaked from a lab in China, but says evidence for scenario remains “speculation”

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Kristian G. Andersen @kgandersen.bsky.social · 06/06/2025

In 2019, NIAID proposed an ambitious scientific network focused on pandemic preparedness, research, and response - the "CREID Network". Ten centers kicked off just as the pandemic was taking off, playing critical roles throughout. We were just notified the whole network is terminated. Reason? 👇

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Raphaëlle K @raph-klitting.bsky.social · 05/06/2025

Super happy to see the communication of the wonderful team of the french NRC in Réunion island on the current CHIKV epidemic out today ! #IDSky Highlights on the epidemic lineage: -ECSA-2 -linked to central African strains -E1-A226V -emergence in early August 2024 For more details 👇👇

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Edyth Parker @edythparker.bsky.social · 04/06/2025

We have updated estimates for the Mpox outbreak in Sierra Leone. We estimate that the G.1 lineage started to diversify in SL around 16 November, suggesting 1-2 months of circulation before detection. G.1's estimated growth corresponds to a doubling time of ~2 weeks: virological.org/t/genomic-ep...

virological.org

Genomic epidemiology of Mpox virus in Sierra Leone

This post has been updated to include new sequences, new analysis, and revised estimates. Background Sierra Leone confirmed its first Mpox case on January 10, 2025, with the Minister of Health declar...

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Kristian G. Andersen @kgandersen.bsky.social · 22/05/2025

The spread of Mpox in Sierra Leone is unlike anything we have ever seen - and we have been keeping an eye on this bug in the region for >15 years. Given geographical spread, 50/50 men vs women, this is no "sexual network". This could be the next one. clt.npha.gov.sl/outbreak.aspx

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Hannah Ritchie @hannahritchie.bsky.social · 19/05/2025

An important reminder that measles vaccines save millions of lives every year across the world. The measles vaccine is arguably the most life-saving vaccine in use. Our latest article from @scientificdiscovery.dev and @spoonerf.bsky.social: ourworldindata.org/measles-vacc...

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Edyth Parker @edythparker.bsky.social · 19/05/2025

Our consortium's paper on Mpox in West Africa is finally out today: "Genomics reveals zoonotic and sustained human Mpox spread in West Africa" rdcu.be/emGKq. Extremely fortunately to get to work with such an exceptional team of African public health scientists, and our partners!

rdcu.be

Genomics reveals zoonotic and sustained human Mpox spread in West Africa

Nature - Genomics reveals zoonotic and sustained human Mpox spread in West Africa

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Helen Branswell 🇨🇦 @helenbranswell.bsky.social · 09/05/2025

#CDC reports that as of 5/8, there have been 1001 confirmed measles cases in 31 jurisdictions. There have been 14 outbreaks (≥3 cases) so far in 2025 & 93% of the total confirmed cases are linked to one of the outbreaks. 13% of these cases have needed hospital care. www.cdc.gov/measles/data...

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Gytis Dudas @evogytis.bsky.social · 03/04/2025

We're looking for a PhD student to join us at Vilnius University in Lithuania. We work on RNA virus evolution computationally but we'd like to generate more mosquito RNA virus sequence data. Official ad: www.gmc.vu.lt/en/doctoral-.... Please share & continue reading if interested.

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Edyth Parker @edythparker.bsky.social · 01/04/2025

Perspective on Immunological drivers of zoonotic virus emergence, evolution, and endemicity, written with some of my favourite people. Read it before its thoughtcrime! authors.elsevier.com/c/1ks2e3qNrU...

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Joshua Weitz @joshuasweitz.bsky.social · 28/03/2025

Working with an interdisciplinary team, we have developed a website to communicate how the White House's proposed cuts to health research would cause losses of $16B and 68,500 jobs. Find out how your community may be impacted. Explore more at SCIMaP: scienceimpacts.org a 🧵

US map via scienceimpacts.org visualization of economic loss due to IDC cuts to 15% as part of Feb 7, 2025 executive order, with shading denoting intensity of cuts.

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Max Kennerly @maxkennerly.bsky.social · 25/03/2025

If even Jeffrey Goldberg is saying "there's too much preemptive obeying for my taste" then the winds are indeed shifting.

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Mark Cuban @mcuban.bsky.social · 22/03/2025

From 2010 to 2016 (latest data I have ), NIH research contributed to EVERY drug approved by the FDA

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FX Coudert @nanoporous.net · 19/03/2025

French researcher, going to a conference in Houston, was forbidden entry to US; his work and personal electronics were both confiscated. Why? Because a “random search” of his cell phone revealed a negative personal opinion on Trump and the Trump administration. www.lemonde.fr/internationa...

lemonde.fr

Etats-Unis : un chercheur français refoulé pour avoir exprimé « une opinion personnelle sur la politique menée par l’administration Trump »

Le ministre de la recherche a dit sa « préoccupation », mercredi, après cette décision des autorités américaines. Le chercheur du CNRS aurait subi un contrôle aléatoire à son arrivée, avant que son or...

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Kristian G. Andersen @kgandersen.bsky.social · 16/03/2025

Well worth a read. Not because of the content - it's total horseshit - but because it's a prime example of what happens when you mix anti-science, conspiracism, arrogance, and a total lack of expertise. Maybe one day NYT OpEds will engage with the actual science 🤷‍♂️. www.nytimes.com/2025/03/16/o...

nytimes.com

Opinion | We Were Badly Misled About Covid (Gift Article)

The same dangerous mistakes. The same lack of candor.

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Adam Kucharski @adamjkucharski.bsky.social · 12/03/2025

Do you know what’s great about vaccines? We can stop outbreaks in the first place, so we don’t have to discuss half-witted hypotheticals about the precise circumstances we’d rather have kids exposed to a deadly, disabling virus…

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Eric Topol @erictopol.bsky.social · 11/03/2025

Today marks the beginning of OpenRxiv, which replaces bioRxiv and medRxiv, the world's largest preprint platform for life and medical science openrxiv.org/introducing-... @openrxiv.bsky.social

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Adam Kucharski @adamjkucharski.bsky.social · 02/03/2025

Frustrating to see science communicators posting videos about how a person with measles infects 18 others on average, without mentioning this is in a *fully unvaccinated* population. Measles can spread quickly in under vaccinated pockets of the population, but we don’t need to overstate risk. 1/

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Helen Branswell 🇨🇦 @helenbranswell.bsky.social · 28/02/2025

Claims that Uganda's #Ebola outbreak was under control appear to have been premature. This child's family sought care in 3 hospitals before he died. So more cases will likely follow. www.nytimes.com/2025/02/28/h...

nytimes.com

A 4-Year-Old Boy Dies of Ebola in Uganda as U.S. Pulls Back on Help

The Trump administration has canceled at least four of the five contracts with organizations that helped manage the outbreak in Uganda.

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Adam Kucharski @adamjkucharski.bsky.social · 25/02/2025

When an epidemic hits, how long does it take to get going with common epidemic analysis tasks? A couple of weeks ago, we asked representatives from over a dozen UK organisations and universities who work actively on epidemic analysis and modelling how long the below tasks would take them.... 1/

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Alexandra Phelan 余雪莲 @alexandraphelan.bsky.social · 25/02/2025

WHO Africa has shared info on the unidentified illness in DRC in its weekly bulletin. It highlights the “significant public health threat” and “urgent action needed”. As of 15 Feb, 419 cases and 45 deaths (CFR 10.7%) identified. Ebola and Marburg have been ruled out.

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Edyth Parker @edythparker.bsky.social · 25/02/2025

Join us in embedding the Global South, emerging talent and equity firmly within health security and the 100 Day Mission!

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Vincent Raquin @drraquin.bsky.social · 19/02/2025

Interested in a #job as a tech in #IVPC lab, Lyon, France? Field work, molecular biology, pathogen detection, entomology in a young, inclusive, sustainable & dynamic environment! Please RT!! jobs.inrae.fr/concours/con... @inrae-france.bsky.social

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