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

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 👇

github.comGitHub - sdellicour/chikungunya_reunion: Input files and scripts related to our study entitled "Unravelling the epidemiological and dispersal dynamics of the 2024-2025 chikungunya virus outbreak on Ré...Input files and scripts related to our study entitled "Unravelling the epidemiological and dispersal dynamics of the 2024-2025 chikungunya virus outbreak on Réunion island" (Frumence et a...

>> We show that virus spread has been shaped by the distribution of the population, as dispersal events occurred more often from and towards most populated areas 👪 >> nice animation by @sdellicour.bsky.social here : github.com/sdellicour/c...

12/1/26, 9:54 am0 reposts0 likes

>> 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 🚗

>> 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. 📉