Overview
- Level 2 notices urge travelers to practice enhanced precautions when visiting the four locations due to active chikungunya outbreaks.
- The CDC recommends vaccination for at-risk travelers and emphasizes repellents, long sleeves, and screened or air-conditioned lodging to prevent mosquito bites.
- WHO reporting for Jan.–Sept. 2025 counts roughly 445,000 suspected or confirmed cases and 155 deaths across about 40 countries.
- Guangdong Province has recorded roughly 16,000 locally transmitted cases, the largest documented chikungunya outbreak in China.
- Additional countries flagged as elevated risk for U.S. travelers include Brazil, Colombia, India, Mexico, Nigeria, Pakistan, the Philippines, and Thailand, while the U.S. reports no locally acquired cases since 2019.