确诊超4000例！关于基孔肯雅热，张文宏首次发声！世卫警告：正在全球多地扩散，已有119个国家报告病例，约550万人面临感染风险

Core Viewpoint - The recent outbreak of Chikungunya fever in Shunde District, Foshan City, Guangdong Province, has raised significant public health concerns, with over 4,000 confirmed cases reported, primarily mild [1][5][18]. Group 1: Current Situation and Spread - As of July 24, Foshan has reported over 4,000 confirmed cases of Chikungunya fever, with Shunde District accounting for 3,627 cases, all classified as mild [1][5]. - The World Health Organization has warned that the Chikungunya virus is spreading globally, with 119 countries reporting cases and approximately 5.5 million people at risk of infection [1][18]. Group 2: Expert Insights - Zhang Wenhong, a prominent infectious disease expert, explained that the rapid spread of the virus in southern China is due to a lack of prior immunity against Chikungunya fever, as there have been no significant outbreaks in the past [3][5]. - He emphasized the importance of timely and effective measures to control the outbreak, suggesting that the current situation still presents an opportunity to prevent further spread [5]. Group 3: Disease Characteristics - Chikungunya fever is an acute mosquito-borne viral disease first identified in East Africa in 1952, now prevalent in over 100 countries, particularly in Southeast Asia, South Asia, and Africa [8]. - The virus is primarily transmitted by Aedes mosquitoes, and human-to-human transmission does not occur [8][12]. Group 4: Symptoms and Risks - The incubation period for Chikungunya fever ranges from 1 to 12 days, with most cases presenting symptoms such as sudden fever, rash, and joint pain [10]. - High-risk groups for severe cases include newborns and individuals over 65 years old, especially those with underlying health conditions [10]. Group 5: Preventive Measures - The Beijing CDC has indicated that the risk of local infection in Beijing is extremely low due to the absence of Aedes mosquitoes, and effective mosquito control measures can mitigate the risk [14][15]. - Recommendations for prevention include wearing light-colored long sleeves and using effective mosquito repellents, especially in areas with high mosquito density [16].