China is currently experiencing its largest outbreak of chikungunya fever, a mosquito-borne viral disease, primarily affecting the southern provinces of Guangdong and Guangxi. Since mid-June 2025, nearly 8,000 cases have been reported, with Guangdong province accounting for a substantial portion of infections, particularly in Foshan city. The outbreak peaked with weekly new cases nearing 3,000 but has recently declined to approximately 1,387 cases in the week ending August 9, signaling initial success in containment efforts. Health authorities have implemented extensive measures including public awareness campaigns, quarantine hospitalizations, patient isolation, insecticide spraying, drone deployments, and the release of laboratory-bred mosquitoes to curb transmission. The National Disease Control and Prevention Administration has issued updated technical guidelines for chikungunya prevention and control, designating Guangxi as a Category I risk area. Chinese scientists have also developed a rapid detection kit that reduces diagnosis time to under 30 minutes. Despite the recent decline in new cases, experts caution that vigilance must be maintained due to favorable wet weather conditions that support mosquito breeding. The outbreak has prompted warnings in neighboring regions such as Hong Kong, where new infections have been recorded. Globally, travel-related chikungunya cases have increased, with England reporting a near tripling in the first half of 2025 compared to the previous year.