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元江县位于云南省西南部，地处北纬２３°３４′，东经１０１°５７′，年平均气温２４℃，年降雨量８００ｍｍ，海拔３７２～２４００ｍ，坝区海拔为４５０ｍ，是历史上疟疾高度流行区；半山区、山区为中低疟区。为进一步了解不同地区不同人群的疟疾流行程度，于１９９６年８
Located in the southwestern part of Yunnan Province, Yuanjiang County is located at latitude 23 ° 34 ’north latitude and longitude 101 ° 57’ east with an annual average temperature of 24 ° C. The annual rainfall is 800 mm, the elevation is 372 ~ 2400 m and the dam elevation is 450 m. District; Mid-levels, mountainous areas for the low-malaria. In order to further understand the prevalence of malaria in different populations in different regions, in 1996 8