Chikungunya virus is re-expanding across the Southwest Indian Ocean.
Mayotte: As of 2 May 2025, a total of 89 chikungunya cases have now been reported in Mayotte. This includes 28 locally acquired cases. The last outbreak of chikungunya occurred in 2006.
Mauritius has reported at least 17 cases.
La Réunion: As of 30 April 2025, over 44,000 confirmed chikungunya cases (including 9 deaths) on the island since the start of 2025. The outbreak is ongoing and widespread throughout Réunion.
Optimal mosquito protection 24/7, also in cities (also against other mosquito-borne diseases such as Zika, dengue).
Vaccination against chikungunya is licensed in Europe but not yet in Switzerland.
Of note: The French National Authority for Health (HAS) have withdrawn vaccination in people over 65 years whilst a small number of possible adverse reactions in this age group are investigated.
In case of fever:
- ensure adequate hydration and take paracetamol products.
- avoid taking medications containing acetylsalicylic acid (e.g., Aspirin®), as this can increase the risk of bleeding during certain viral infections. However, do not stop taking medications containing acetylsalicylic acid if it is already part of your regular treatment for an underlying condition.