Vittoria Colizza @vcolizza.bsky.social · 27/08/2026arcane.sciencesconf.orgarcane.sciencesconf.orgARCANE International Workshop - Sciencesconf.org Sciencesconf.org 000
Vittoria Colizza @vcolizza.bsky.social · 27/08/2026Abstract deadline approaching! Join us in Paris 🇫🇷 on 19–21 October 2026 for the ARCANE International Workshop on Adaptive Healthcare Networks & Antimicrobial Resistance. Three days at the intersection of healthcare networks, infectious disease dynamics & AMR. @arcane-project.bsky.social 221
Vittoria Colizza @vcolizza.bsky.social · 03/07/2026@giuliapullano.bsky.social @bansallab.bsky.social Stefania Rubrichi Monthly mobility fluxes available with the publication. 011
Vittoria Colizza @vcolizza.bsky.social · 03/07/2026Using Orange mobile phone data from Senegal, we study the resolution required to transform individual mobility trajectories into epidemiological coupling between populations, and highlight key pitfalls of commonly used approaches: journals.plos.org/ploscompbiol... bsky.app/profile/giul...journals.plos.orgMobility data resolution needed to inform predictive models of spatial epidemic spread from mobile phone dataAuthor summary Human mobility patterns play a crucial role in the spatial spread of infectious diseases, as pathogens move between communities through the movements of infected individuals. During the... 131
Vittoria Colizza @vcolizza.bsky.social · 03/07/2026What’s the spatial resolution of mobile phone data needed to inform predictive models of spatial epidemic spread? 151
Vittoria Colizza @vcolizza.bsky.social · 24/06/2026Our study, now published in the Journal of Travel Medicine @jtravmed, explores how mobility and possible outbreak expansion shape the risk of international spread of Ebola: academic.oup.com/jtm/advance-...academic.oup.comEstimating importation risk of Bundibugyo Ebola virus disease to Europe under different outbreak expansion scenariosFederico Fanelli, MsC, Francesco Parino, PhD, Chiara Poletto, PhD, Vittoria Colizza, PhD; Estimating importation risk of Bundibugyo Ebola virus disease to 000
Vittoria Colizza @vcolizza.bsky.social · 24/06/2026www.epicx-lab.com/2026-ebola-b... www.epicx-lab.com/uploads/9/6/... @Inserm @FaculteSanteSU @agenceANRSepicx-lab.com2026 Ebola Bundibugyo epidemicOn 15 May 2026, Africa CDC reported an outbreak of Ebola virus disease caused by Bundibugyo virus in eastern Democratic Republic of the Congo (DRC), primarily affecting Ituri Province, with suspected.... 100
Vittoria Colizza @vcolizza.bsky.social · 24/06/2026The first Ebola case has been reported today in France. Our rapid risk assessment last month showed that France consistently ranked among the European countries at highest risk of importation if an Ebola case were to arrive in Europe from the ongoing Bundibugyo outbreak. 145
Vittoria Colizza @vcolizza.bsky.social · 26/05/2026SUMOC seminar tomorrow by Giulia Pullano (also online) 163
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026Supporting outbreak response where transmission occurs remains the most effective strategy both to reduce the local burden of the epidemic and to limit international spread. 000
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026But broad travel restrictions may also have unintended consequences by isolating affected countries and hindering the mobilization of healthcare workers, medical supplies, and intl support - concerns raised during the 2014 Ebola epidemic and readily emphasized today by AfricaCDC. 100
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026Such modest delays may provide valuable time to strengthen preparedness, surveillance, and response capacities. 100
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026Modern transportation networks further amplify spatial spread because they are highly heterogeneous: a small number of major hubs concentrate a very large share of global connectivity. www.nature.com/articles/nph... journals.aps.org/prl/abstract... www.sciencedirect.com/science/arti... @alexvespi 110
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026www.cochranelibrary.com/cdsr/doi/10.... Even in the absence of pre-symptomatic or asymptomatic transmission, infected travelers may still go undetected at border controls during their incubation period.cochranelibrary.com 110
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026Additional travel-related measures (screening, testing, quarantine, traveller monitoring) may contribute to reducing importation risk under specific conditions, but their effectiveness depends strongly on operational implementation and pathogen characteristics. 110
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026www.sciencedirect.com/science/arti... www.science.org/doi/abs/10.1... journals.plos.org/plosone/arti... @alainbarrat @DirkBrockmann 110
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026Mathematically, the delay increases only logarithmically with the magnitude of travel reduction — so very large reductions produce only modest delays in international spread. www.nature.com/articles/nm0... www.sciencedirect.com/science/arti... 110
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026Why? Because once sustained transmission is established in the epidemic source area, cases grow exponentially. Even if travel volumes are drastically reduced, the rapidly increasing number of infections at the source continues generating some infected travelers. 100
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026However, theoretical, computational, and empirical studies consistently show that travel restrictions alone generally produce only moderate delays — typically on the order of days to weeks. 100
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026This may seem counterintuitive. Infectious diseases spread through human mobility, so one may expect that strongly reducing travel would prevent international spread. 100
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026Our analyses showed that once sustained transmission is established in the epidemic source area, even large reductions in travel still allow some infected individuals to move internationally. www.eurosurveillance.org/content/10.2... @chpoletto.bsky.social @alexvespi.bsky.socialeurosurveillance.orgEurosurveillance | Assessing the impact of travel restrictions on international spread of the 2014 West African Ebola epidemicThe quick spread of an Ebola outbreak in West Africa has led a number of countries and airline companies to issue travel bans to the affected areas. Considering data up to 31 Aug 2014, we assess the impact of the resulting traffic reductions with detailed numerical simulations of the international spread of the epidemic. Traffic reductions are shown to delay by only a few weeks the risk that the outbreak extends to new countries. 110
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026During the 2014 West African Ebola epidemic, large reductions in air traffic and multiple border closures were estimated to delay international spread by only a few weeks, without preventing it. @chpoletto.bsky.social @alexvespi.bsky.social 120
Vittoria Colizza @vcolizza.bsky.social · 25/05/2026As discussions on Ebola and border controls intensify, it is important to go back to what available scientific evidence actually shows. In @lefigaro.fr, I discuss what we learned from past Ebola epidemics and travel restrictions. www.lefigaro.fr/sciences/pas...lefigaro.fr«Passoire», «bombe sanitaire»... Mayotte doit-elle verrouiller ses frontières face au risque d’épidémie d’Ebola ?DÉCRYPTAGE - Estelle Youssouffa, députée de l’archipel, reproche à l’État son «impuissance» et sa «passivité» en matière de lutte contre l’immigration clandestine. Le Figaro fait le point sur le risqu... 133
Vittoria Colizza @vcolizza.bsky.social · 24/05/2026www.medrxiv.org/content/10.6...medrxiv.orgInternational risk of secondary hantavirus clusters following MV Hondius outbreakThe multinational Andes virus outbreak linked to the MV Hondius has exposed contacts across several countries, but the absence of further confirmed cases remains difficult to interpret given the long ... 021
Vittoria Colizza @vcolizza.bsky.social · 24/05/2026On May 22 WHO reported 1 more #hantavirus case linked to the MV Hondius, while some high-risk contacts are still being located. We estimated that heterogeneous isolation + uncertainty on pre-sympt transmission leave a non-negligible risk of secondary clusters. Work led by @eugeValdano. 153
Vittoria Colizza @vcolizza.bsky.social · 22/05/2026Wrapping up the *10th edition* of the Lake Como School on Complex Networks at Villa del Grumello 🇮🇹 A fantastic week of lectures and discussions, celebrating this milestone edition ✨ 141
Vittoria Colizza @vcolizza.bsky.social · 22/05/2026The associated reports will be made publicly available soon. 030
Vittoria Colizza @vcolizza.bsky.social · 22/05/2026The analyses informed ongoing discussions with French health authorities and government preparedness efforts: www.info.gouv.fr/actualite/eb...info.gouv.frEbola : point de situation et mesures mises en oeuvre | info.gouv.frFace à l’épidémie d’Ebola en cours en République démocratique du Congo, le Gouvernement a renforcé les mesures de surveillance et de prévention, notamment à Mayotte. 120
Vittoria Colizza @vcolizza.bsky.social · 22/05/2026Our recent analyses on the international dissemination risk associated with the current Bundibugyo Ebola outbreak in eastern DRC are discussed in @lemonde.fr today: www.lemonde.fr/planete/arti... #SUMOC @inserm.fr @fac-sante-sorbonne.bsky.sociallemonde.frEbola : quel est le risque de propagation du virus au-delà de la RDC ?L’estimation de la taille réelle de l’étendue de l’épidémie, tout comme le risque de dispersion dans la région et au-delà, met les chercheurs au défi d’une flambée épidémique aux multiples inconnues. 143
Vittoria Colizza @vcolizza.bsky.social · 21/04/2026What we choose to implement - and when - matters. Our work shows that proactive screening strategies can reduce transmission by ~40% vs reactive responses. A key lesson for preparedness. In PNAS Nexus: ow.ly/cLnu50YCrcnow.lyProactive vs. reactive COVID-19 screening in schools: Lessons from experimental protocols in France during the Delta and Omicron wavesAbstract. The COVID-19 pandemic prompted diverse policies to manage safety in schools, balancing transmission control with educational continuity. We evalu 0127
Vittoria Colizza @vcolizza.bsky.social · 19/04/2026Great discussion with @billhanage.bsky.social and the audience at #ESCMIDGlobal2026 during our session “Pathogens and people: modelling epidemics for preparedness”. Strong focus on how to improve preparedness in collaboration with public health institutes - lots to take forward. 163
Vittoria Colizza @vcolizza.bsky.social · 31/03/2026PhD opportunity at SUMOC (Sorbonne Université | INSERM), Paris, within the EPIcx lab. 🦠 Project: SPILL-AI (mobility data, AI, epidemic modeling) ⚠️ Selected candidate will be submitted to competitive funding (SCAI) Apply by April 12, 2026 www.epicx-lab.com/open-positio...epicx-lab.comOpen position — AI-driven causal inference of behaviors in response to an epidemic30/03/2026 PhD position on AI-driven causal inference of behaviors in response to an epidemic (SPILL-AI) Location: Paris, France Institution: INSERM | Sorbonne Université Faculty of Health... 055
Vittoria Colizza @vcolizza.bsky.social · 19/03/2026Join ESPIDAM 2026 — the European Summer Program in Infectious Disease Analysis & Modelling! A unique training opportunity for early-career researchers in epidemic modelling 🦠📊 ⏳ Early bird deadline: March 31 www.su.se/english/divi... 077
Vittoria Colizza @vcolizza.bsky.social · 10/03/2026t.co/aMHzKyW5dc t.co/lu9xV8gRmAt.cohttps://www.epicx-lab.com/open-position-mdash-network-epidemiology-of-healthcare-associated-infections.html 000
Vittoria Colizza @vcolizza.bsky.social · 10/03/2026Two postdoc positions open at SUMOC (Sorbonne Université | INSERM), Paris, within the EPIcx lab. 🦠 Network epidemiology of healthcare-associated infections (ARCANE) 🧠 Coupled behavior–disease modeling (PREVIX) 2-y positions | Start June 2026 #epidemiology #networks #matrices 1913
Reposted by Vittoria ColizzaLaura Di Domenico @lauradidomenico.bsky.social · 28/01/2026Mobility-based synthetic contact matrices offer a promising alternative for real-time pandemic response modeling. How do they compare with traditional empirical contact matrices? We address this question in our latest study, now published in Nature Communications ⬇️ doi.org/10.1038/s414...doi.orgMobility-driven synthetic contact matrices as a scalable solution for real-time pandemic response modeling - Nature CommunicationsContact matrices are used to describe social mixing patterns and inform mathematical models of disease transmission. Here, the authors evaluate the accuracy of synthetic contact matrices generated usi... 173
Vittoria Colizza @vcolizza.bsky.social · 21/01/2026Joint work with @santepubliquefrance.fr #mpox #publichealth #behavior #epidemiology @inserm.fr @fac-sante-sorbonne.bsky.social #SUMOC 000
Vittoria Colizza @vcolizza.bsky.social · 21/01/2026These results highlight the key role of spontaneous community-driven behaviour change, and the importance of risk communication and community engagement in outbreak control. 100
Vittoria Colizza @vcolizza.bsky.social · 21/01/2026Model results aligned with post-outbreak survey data (ERAS 2023) reporting that ~46% of MSM reduced sexual partners during that outbreak. 100
Vittoria Colizza @vcolizza.bsky.social · 21/01/2026Instead, the decline was best explained by widespread behavioural change, adopted by ~half of MSM, *independently of individual risk level*. This prevented an estimated ~70% of potential cases during summer 2022. 100
Vittoria Colizza @vcolizza.bsky.social · 21/01/2026We found that vaccination and infection-induced immunity alone could not explain the early downturn. 100
Vittoria Colizza @vcolizza.bsky.social · 21/01/2026We used a network model of mpox transmission among MSM, grounded in sexual behaviour data, to disentangle the drivers: post-exposure vaccination, immunity among highly active individuals, behavioural adaptations. 100
Vittoria Colizza @vcolizza.bsky.social · 21/01/2026*New paper in Nature Health* Why did the 2022 mpox outbreak in Paris decline so abruptly? rdcu.be/eZ24Hrdcu.beRole of behaviour change in controlling the 2022 Paris mpox outbreakNature Health - Behaviour changes, rather than vaccination or postinfection immunity, best explained the sudden decline of mpox cases among men who have sex with men during an outbreak in the Paris... 13112
Vittoria Colizza @vcolizza.bsky.social · 09/12/2025epicontacts2025.weebly.com/agenda.html anrs.fr/en/scientifi...anrs.frScientific group : French Research action on modelling epidemics FRAMEFRAME :French Research action on modelling epidemics 020
Vittoria Colizza @vcolizza.bsky.social · 09/12/2025Great second day at the #EPICONTACTS2025 workshop — engaging talks at the interface of contact matrices, epidemiology, behavioral data, and network science. This initiative is part of FRAME, the French Research Action on Modeling Epidemics supported by @anrs-mie.bsky.social 1101