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The trend in the global BU cases was similar to that of Cameroon with a rise from 3245 cases in 2002 to a peak at 5937 in 2004, followed by a progressive reduction to reach 2250 in 2014.The global BU data was downloaded from the WHO website at http://apps.who.int/gho/indicatorregistry/App_Main/view_indicator.aspx?iid=2448
