U.S. health officials are urging Americans traveling abroad to be on high alert as multiple countries report growing outbreaks of chikungunya, an untreatable mosquito-borne virus that has surged across parts of Asia, the Caribbean, and southern China.
The Centers for Disease Control and Prevention (CDC) announced new Level 2 travel advisories for Cuba, Bangladesh, Sri Lanka, and Guangdong Province in China. The alerts encourage travelers to take enhanced precautions, especially because there is currently no antiviral treatment for chikungunya.
Although no treatment exists for the disease itself, officials note that chikungunya is preventable through vaccination, which is strongly recommended for anyone visiting outbreak-affected regions.
Chikungunya typically begins with fever and intense joint pain, and some patients also experience headaches, rashes, muscle aches, or swelling. Symptoms usually begin three to seven days after a mosquito bite, and most people recover within a week. However, severe cases can lead to months or years of debilitating joint pain. In the most serious situations, the virus can cause organ damage or even be fatal, according to the World Health Organization (WHO).
WHO data from October 3 shows that worldwide, between January and September 2025, there were 445,000 suspected and confirmed chikungunya cases and 155 deaths.
Several countries are reporting significant spikes:
Bangladesh: Roughly 700 suspected cases were identified in Dhaka during the first nine months of 2025.
Guangdong Province, China: Officials have logged 16,000 locally transmitted cases, marking the largest outbreak ever recorded in China.
Cuba: From January through late September, 34 confirmed cases prompted public health measures to contain spread.
Sri Lanka: Between January 1 and mid-March 2025, 150 confirmed cases were recorded, with infections peaking in June.
With no treatment available and outbreaks growing, U.S. health agencies stress the importance of preventing mosquito exposure. Travelers are being encouraged to:
Use insect repellent consistently
Wear long sleeves and pants
Stay in screened or air-conditioned buildings
Consider receiving the chikungunya vaccine before travel
As outbreaks continue to evolve, officials say updated information will be provided to help travelers assess their risks before heading abroad.
Photo credit: Flickr