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. 2011 Oct;17(10):1894–1896. doi: 10.3201/eid1710.110397

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Lefrass Oasis, 30 km north of Atar, one of the main outbreak foci of an outbreak of Rift Valley fever in camels, northern Mauritania. Inset shows the location of Atar and Aoujeft and the isohyets (average during 1965−2002; source: Food and Agricultural Organization of the United Nations, Land and Water development Division).