What Is a Dengue Fever?

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Dengue fever is a disease caused by a family of viruses transmitted by mosquitoes. These viruses are related to the viruses that cause West Nile infection and yellow fever. An estimated 390 million dengue infections occur worldwide each year, with about 96 million resulting in illness. Most cases occur in tropical areas of the world, with the greatest risk occurring in:
  • Africa
  • Central and South America (except Chile, Paraguay, and Argentina)
  • Mexico
  • Southeast Asia
  • Southern China
  • Taiwan
  • The Caribbean (except Cuba and the Cayman Islands)
  • The Indian subcontinent
  • The Pacific Islands
Most cases in the United States occur in people who contracted the infection while traveling abroad. But the risk is increasing for people living along the Texas-Mexico border and in other parts of the southern United States. Keyword: dengue fever