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(added on 2015/09/22)

Dengue North and South 本土登革熱的南北差異

©2015 SpatioEpi.com
Map created by CUHK SpatioEpi Group

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As of mid-September, more than 13,000 local dengue fever cases had been reported in Taiwan in 2015. The situation in this summer was exceptionally severe. New cases in the third quarter (week 27 to 37) contributed to 98% of all cases through September 2015. The map illustrated newly reported dengue cases by county/city in Taiwan during the said period. A heterogeneous spatial pattern of case distribution could be observed. Dengue cases were highly concentrated in the southern part of Taiwan than in the north. Specifically, Tainan City has reported over ten thousand confirmed cases.

The line graphs next to the map delineated the local dengue incidence patterns in 3 selected cities from 2009 to mid-September of 2015. Red lines indicated the situation in the third quarter of 2015, corresponding to data used for displaying the spatial pattern on the map. Over the years, sporadic infections have occurred in Taipei City, whereas Tainan City and Kaohsiung City were characterized by the hundreds and thousands of new cases monthly. The seasonal transmission pattern of dengue virus in Southern Taiwan can be inferred: infections were commonly imported during summer, spreading widely within the community and finally faded out in winter. In the past few years, reported incidence in Kaohsiung City was higher Tainan City, yet the situation has reversed in 2015.

Map data were derived from Taiwan Open Data Platform.

截至9月中,台灣2015年已累積超過一萬三千宗登革熱呈報個案。這年夏季的情況特別嚴峻,第三季(第27至37週)的新增病例佔全年至9月總數的98%。地圖顯示該時段登革熱在台灣各縣市的新增病例數目分佈。明顯地登革熱在全台的流行情況並不一致,南部比較北部為嚴重,當中的台南市已確診逾萬宗病例。

地圖右方的折線圖勾劃了三個城市於2009至2015年9月中的登革熱本土感染情況,紅色線代表2015年第三季亦即地圖數據的收集時段。台北市的本土感染每月只有不足十宗,而台南市和高雄市則數以百甚至千計。南部的登革熱爆發有季節性模式:夏季外地傳入感染,然後在社區蔓延,最後在冬季結束。在過去數年,高雄市的感染率明顯比台南市高,但2015年的情況剛好相反。

地圖資料源自台灣政府資料開放平臺。