A new study warns parts of South America currently at a low risk of dengue could see many more cases of the disease in the coming years. Dengue fever could soon spread to South America's high Andes region and other parts of the world currently free of the disease, according to new research published Monday. ?Changes to climate could result in increased exposure and pose a serious threat to areas that do not currently experience endemic dengue,? warned a report from the United Nations University. Large areas of South America's mountainous regions have historically been either low risk for dengue fever, or free of the disease entirely. In the Western Hemisphere, dengue is widespread across lowland areas of Mexico, Central America, northern countries of South America, and parts of the Caribbean. Over 2 million cases of the disease are reported annually across the Americas, mostly in low lying tropical areas.

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