Core Viewpoint - The risk of mosquito-borne diseases, particularly dengue fever and chikungunya, is significantly increasing during the summer due to rising temperatures and increased rainfall, prompting health authorities to issue warnings and preventive measures [1][3]. Group 1: Current Situation and Challenges - The incidence and mortality rates of mosquito-borne diseases in China have significantly decreased since the founding of the People's Republic of China, with malaria being declared eliminated in 2021 [2]. - Globalization and climate change present new challenges for the prevention and control of mosquito-borne diseases, with the World Health Organization reporting a record high of 14 million dengue cases globally in 2024 [3]. - Cross-border movement of mosquitoes poses a significant "external input" risk for China, particularly in border areas like Yunnan, where there is a risk of disease transmission from neighboring countries [3][4]. Group 2: Specific Diseases and Symptoms - Dengue fever and chikungunya are highlighted as key concerns, with recent reports of local outbreaks in southern provinces of China, including a recent chikungunya case in Foshan, Guangdong [5]. - Chikungunya is transmitted by Aedes mosquitoes and has a typical incubation period of 1 to 12 days, with symptoms including sudden fever, rash, and joint pain, which can be severe [5][6]. - Most chikungunya cases are mild, with recovery typically occurring within a week, and severe cases and fatalities are rare [5]. Group 3: Preventive Measures - Four key preventive measures are recommended to reduce the risk of infection: 1. Eliminate mosquito breeding sites by regularly cleaning areas where water can accumulate [8]. 2. Create a "mosquito-free" environment through personal protective measures, such as wearing long sleeves and using mosquito repellent [8]. 3. Stay informed about outbreaks in travel destinations, especially in regions where dengue and chikungunya are prevalent [8]. 4. Seek medical attention promptly if symptoms arise, providing travel and mosquito exposure history to healthcare providers [8].

Group 1 - The article highlights that mosquitoes are responsible for approximately 780,000 deaths annually, making them the deadliest animals globally [1][6][5] - In China, mosquito-borne diseases such as dengue fever and malaria are on the rise, with dengue cases experiencing a significant increase in recent years [2][9][11] - The distribution of mosquitoes in China is not limited to southern provinces; several northern provinces also have high mosquito populations [15][17] Group 2 - The main mosquito-borne diseases in China include dengue fever, malaria, and Japanese encephalitis, all of which can have severe health impacts [9][11] - Dengue fever is currently the most concerning mosquito-borne disease in China, with a rapid increase in cases reported in 2023 [9][11] - The spread of mosquito-borne diseases is closely linked to economic development, population mobility, and climate change, with global dengue cases increasing approximately 30 times over the past 50 years [11] Group 3 - The most common mosquito species in China include Aedes albopictus, Culex pipiens, and Anopheles sinensis, with a total of 418 known species [19] - Mosquito activity peaks at specific times, with different species exhibiting varying feeding patterns, which can influence their impact on human populations [20][21] - Mosquito saliva contains allergens that can cause significant immune responses in humans, leading to more severe reactions to bites from certain species [25]