Chikungunya virus outbreak prompts CDC warning for travelers to China

In recent weeks, the Centers for Disease Control and Prevention (CDC) issued a warning to Americans intending to travel to China regarding an outbreak of the chikungunya virus. The virus, which spreads through mosquito bites, has been especially prevalent in Guangdong Province, with Foshan city reporting over 7,000 confirmed cases since June 2025. The CDC has classified this situation as a Level 2 travel notice, advising travelers to practice enhanced precautions to safeguard their health against this mosquito-borne illness. Chikungunya fever typically manifests with symptoms including severe joint pain, fatigue, and fever within three to seven days following a bite from an infected mosquito. Most individuals recover within a week; however, some can experience debilitating joint pain that persists for months or even years following the initial illness. Furthermore, the CDC highlighted that certain demographics, such as newborns, older adults aged 65 and above, and individuals with pre-existing health conditions like diabetes and heart disease are at a higher risk for severe disease. While deaths from chikungunya are rare, the potential for prolonged discomfort raises concern among health officials. In an effort to curtail the virus's spread, health authorities in Foshan have implemented various measures such as deploying drones to identify mosquito breeding sites, spraying residents with mosquito repellent, and introducing mosquito-eating fish into local ponds. China has endured unprecedented rainfall recently, exacerbating the mosquito population and creating environments conducive to the virus's transmission. The Chinese government has initiated comprehensive response strategies, recalling lessons learned from past epidemics like SARS and COVID-19, to swiftly contain the outbreak by enforcing public health measures. The CDC's warning is not isolated to China, as they also urge caution for travelers to several other countries experiencing chikungunya outbreaks, including Bolivia, Kenya, and Sri Lanka. Preventative measures are stressed, including the use of insect repellent, wearing protective clothing, and ensuring clean living spaces with screened windows and doors. Vaccination is recommended for travelers heading to areas with reported chikungunya outbreaks, emphasizing the need for public awareness to mitigate health risks while traveling internationally.