7/16/2010

Health officials say about 1,000 residents of Key West, Fla., were exposed to the virus that causes dengue fever last year. Officials from the Centers for Disease Control and Prevention say the high incidence of exposure marks the return of dengue to the U.S. after a 75-year absence. The disease is spread by mosquitoes, and symptoms include a high fever, headaches, rash and muscle and joint pain; it can also result in the potentially fatal dengue hemorrhagic fever.

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