Public health authorities are closely monitoring a important increase in chikungunya cases across the Indian Ocean islands of Réunion and Mauritius [[2]]. The resurgence of the mosquito-borne virus, which can cause chronic joint pain and disability, follows outbreaks reported earlier in the year across multiple countries including Somalia and Sri Lanka [[2]], prompting travel advisories and heightened preventative measures [[1]]. This report details the scale of the outbreaks on Réunion and Mauritius, and the steps being taken to mitigate further spread.
Chikungunya Cases Rise in Réunion and Mauritius, Vigilance Urged Globally
Public health officials are responding to a surge in chikungunya cases in both Réunion and Mauritius, with a significant proportion of the population in Réunion now affected. The mosquito-borne viral illness, while rarely fatal, can cause debilitating joint pain and other severe symptoms, posing a challenge to healthcare systems and impacting quality of life.
In Réunion, nearly half of the population was contaminated with chikungunya in 2025, according to recent data. As of December 10, 2025, the island has reported hospitalized cases and deaths linked to the virus, prompting increased surveillance and control measures.
Mauritius has also confirmed new cases of chikungunya, with recent reports emerging from Roches Brunes. Following the confirmation of a new case, authorities launched fumigation efforts in Rose-Hill to curb the spread of the virus.
Health experts emphasize the importance of remaining vigilant even during the winter months, as the virus can persist and spread through mosquito populations year-round. The virus is transmitted through the bites of infected mosquitoes, primarily Aedes aegypti and Aedes albopictus.
While there is no specific treatment for chikungunya, supportive care can help manage symptoms. Prevention focuses on controlling mosquito populations and avoiding mosquito bites through the use of repellents, protective clothing, and mosquito nets. The current situation underscores the ongoing global threat posed by mosquito-borne diseases and the need for sustained public health efforts to protect vulnerable populations.
