该病毒最早于1931年确定，当时正在对肯尼亚里夫特山谷一农庄羊群中的一种流行病进行调查。
The virus was first identified in 1931 during an investigation into an epidemic among sheep on a farm in the Rift Valley of Kenya.
在里夫特山谷的Munyaka PCEA营地，现已收容了大约3000人，有自来水，但无蓄水箱。
The Munyaka PCEA Camp in the Rift Valley hosts about 3000 residents, and has running water but no storage tanks.
在里夫特山谷的Munyaka PCEA营地，现已收容了大约3000人，有自来水，但无蓄水箱。
The Munyaka PCEA Camp in the Rift Valley hosts about 3000 residents, and has running water but no storage tanks.
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