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Dengue fever is a mosquito-borne disease which is transmitted to humans through bites of infected Aedes mosquitoes. Due to the worsening global warming, the number of dengue fever cases has increased each year, in parallel with the rising mosquito burden. Hong Kong does not have extensive growth of dengue epidemic and most cases are imported. The bar chart shows an increasing trend of the number of dengue fever cases in Hong Kong from 2003 to 2019.

From January to August 2023, countries in tropical and sub-tropical area have been the most affected (coloured in orange and red on the map), such as Bangladesh, Sri Lanka and Philippines. As of 10 August 2023, a total of 25 imported cases of dengue fever from 8 countries (marked by mosquito logos on the map) have been recorded in Hong Kong.

Taking preventive measures is important to avoid local outbreak. At the household level, eliminating mosquito breeding sites could prevent the spread of dengue. When travelling to dengue high-risk areas, protect yourself from mosquito bites by using mosquito repellents and wearing long-sleeves protective clothing would be beneficial.

Data were from World Health Organization (WHO), Centre for Health Protection of Department of Health, Hong Kong, and media reports.

登革熱是一種透過蚊子傳染的疾病，被受感染的伊蚊叮咬過的人會被傳染。由於全球暖化日漸惡化，登革熱個案數隨著蚊患惡化而正在逐年增加。香港並非登革熱廣泛流行的地區，主要以輸入個案為主。長條圖顯示由2003年至2019年期間，香港的登革熱個案宗數呈持續上升的趨勢。

地圖中可見，自2023年1月至同年8月，位於熱帶地區及亞熱帶地區的國家所受影響最爲嚴重 (地圖上以橙色及紅色標示)，例如孟加拉、斯里蘭卡和菲律賓。截至2023年8月10日，香港共錄得25宗登革熱個案，分別從8個國家輸入 (以蚊子圖案標示)。

要預防登革熱在本地爆發，就要做好防蚊措施。在生活環境中，消滅有利蚊蟲滋生的地方可以防止登革熱的傳播。前往登革熱高風險地區時，亦要使用蚊怕水及穿長袖衣服以預防受到蚊蟲叮咬。

資料源自世界衞生組織(WHO)、香港衞生署衞生防護中心及媒體報道。