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With more than one-third of the world’s population living in areas at risk for infection, dengue virus is a leading cause of illness and death in the tropics and subtropics. As many as 400 million people are infected yearly. Dengue is caused by any one of four related viruses transmitted by mosquitoes. There are not yet any vaccines to prevent infection with dengue virus and the most effective protective measures are those that avoid mosquito bites. When infected, early recognition and prompt supportive treatment can substantially lower the risk of medical complications and death.

Dengue has emerged as a worldwide problem only since the 1950s. Although dengue rarely occurs in the continental United States, it is endemic in Puerto Rico and in many popular tourist destinations in Latin America, Southeast Asia and the Pacific islands

image: question markFrequently Asked Questions & Fact Sheet

Key dengue information...

Picture of mapTravel/Outbreak Notices

Critical information for travelers...

Picture of woman applying insect repellentPrevention

Avoid getting infected whether at home or on travel...

Picture with group of peopleIf You Think You Have Dengue...

Symptoms and actions to take...

Picture of vialEpidemiology and Statistics

Transmission, information on epidemics and stats...

Picture of Aedes AegyptiEntomology and Ecology

Mosquito that spreads dengue and its ecology...

Picture of clinicianClinical and Laboratory Guidance

Tools for clinicians and laboratorians...

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Dengue educational tools...

News & Highlights

Advertisement image for Dengue Clinical Case Management course.  Take the Dengue Clinical Case Management Course.  Earn 4 CME credits
New! Need CME, CEU Credit? CDC announces a new 4 CME, .4 CEU credit course: Dengue Clinical Case Management.
Learn how to recognize and diagnose, assess and manage patients with mild to severe dengue.
For more information go to our Dengue Clinical Case Management course (DCCM)training page

Modeling opportunity: Help the USG develop a model to predict dengue epidemics

See the Press Release [PDF - 3 pages]

For more information, see the Dengue Forecasting Project

Contact Us:
  • Centers for Disease Control and Prevention
    Dengue Branch
    1324 Calle Cañada
    San Juan, Puerto Rico
  • 800-CDC-INFO
    TTY: (888) 232-6348
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Centers for Disease Control and Prevention   1600 Clifton Road Atlanta, GA 30329-4027, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO
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