Imported chikungunya in French travelers returning from outbreak-affected regions

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ID: 333482
2026
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Abstract
ABSTRACT Background Outbreaks of chikungunya disease are unpredictable, typically episodic, and explosive. In 2025, several such outbreaks were observed and a marked increase in imported cases of chikungunya to mainland France was reported. This study aimed to describe the rate of chikungunya in French travelers returning from La Réunion, Mayotte, Mauritius, Madagascar, Sri Lanka, and Cuba, all of which showed major chikungunya resurgences in 2025, and to assess the potential burden that CHIKV outbreaks—whether officially notified or not—can cause to travelers. Methods Publicly available data from Santé Publique France were used to extract the number of chikungunya cases, and International Air Transport Association data were used for information on the number of flight tickets to estimate traveler numbers. These data were used to derive monthly rates of imported cases of chikungunya to mainland France from January to December 2025. Results Trends in rates of chikungunya among travelers returning to mainland France from La Réunion and Mayotte closely mirrored the sharp and compact epidemic curves observed locally. Peak imported rates exceeded 1,800 cases/100,000 travelers (La Réunion [April]) and 400 cases/100,000 travelers (Mayotte [May]) and remained above 100 cases/100,000 travelers for March, April, May, and June (La Réunion) and April, May, and June (Mayotte). For Mauritius, Madagascar, Sri Lanka, and Cuba, estimated peak rates were 248, 338, 90, and 2,480 cases/100,000 travelers, respectively, although it was noted that some outbreaks were not officially notified or were reported late. Conclusions Returning travelers to mainland France from regions facing a chikungunya outbreak in 2025 showed a substantial burden of infection and gave rise to local spread of disease, highlighting the importance of robust surveillance systems and timely outbreak notification.
Reference Key
openalex_W7223215685 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Eric Plennevaux, Adrianne Marije de Roo, Guenaelle Augier, Gerard T Vonderling, Juan Carlos Jaramillo
Journal international journal of travel medicine and global health
Year 2026
DOI
10.1093/jtm/taag095
URL
https://doi.org/10.1093/jtm/taag095
Keywords Keywords not found

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