Tropical disease threatens to spread north
(NEWSER) - Dengue fever, the most prevalent virus spread by mosquitoes globally, poses a growing threat across the world's tropical zones, from Southeast Asia to Central America—and now, Florida. Dengue virus is showing up in the Florida Keys, the CDC reported yesterday, with 5 percent of Key West residents exposed to the virus last year and 12 confirmed cases of the fever so far this year, CNN reports. More»