<unk>  fever is endemic in West Africa and is rare in developed countries.<unk>  virus infects 100,000-300,000 individuals annually with a case fatality rate typically reaching 1-5% but may be as high as 65% during outbreaks. There is no predilection to specific age groups, gender, or race. However, young age and pregnancy are associated with increased risk of<unk>  fever-associated complications.
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