The U.S. Centers for Disease Control and Prevention (CDC) today reissued its Level 2, Practice Enhanced Precautions, Travel Health Advisory for chikungunya outbreaks in countries/territories located in the Indian Ocean.
On September 5, 2025, the CDC reported outbreaks of chikungunya in Bangladesh, Kenya, Madagascar, Somalia, and Sri Lanka.
Other outbreaks have occurred in countries in Africa, the Americas, Asia, Europe, the Caribbean, and the Indian and Pacific Oceans.
Chikungunya disease is caused by the chikungunya virus and is transmitted to humans through the bites of infected mosquitoes. Most people infected with the chikungunya virus develop symptoms, according to the CDC.
If you are pregnant, consider reconsidering travel to the affected areas, especially if you are nearing the delivery of your baby. Mothers infected around the time of delivery can pass the virus to their baby before or during delivery.
Newborns infected in this way or by a mosquito bite are at risk for severe illness, including poor long-term outcomes.
The CDC advises vaccination for most travelers who are visiting an area with a chikungunya outbreak. Local travel vaccine experts do offer their advice on eligibility.