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Dengue

Dengue fever is a viral disease caused by the dengue virus (DENV), with a high potential for reinfection.1-3

Areas of risk

map chikungunya

~1/2 of the world’s population lives in areas with dengue risk

Dengue is common in popular tourist destinations such as the Caribbean, Puerto Rico, Central and South America, Southeast Asia, the Pacific Islands, and Africa.4

Key facts

A person may get infected with dengue virus up to 4 times in their life because there are 4 different serotypes of the virus (DENV-1, DENV-2, DENV-3, and DENV-4).1,2

Dengue can be passed to a fetus during pregnancy.

Pregnant women should not travel to areas with dengue outbreaks.5

prevention guidance

Dengue can alter how a person smells to mosquitoes.

Previously infected people attract certain species and are more likely to be bitten again, increasing the chance of contracting another bout of disease.3

Annual dengue rates1

Up to

,
,

infected

Up to

,
deaths

Dengue at a glance

Primary vector5,6

Aedes aegypti and Aedes albopictus

Biting habits:

  • Primarily daytime
  • Can also bite at night

Symptoms7

About 1 in 4 people infected with dengue will get sick.

Most common:

  • Fever

Other:

  • Nausea
  • Vomiting
  • Rash
  • Aches

Symptoms of dengue typically last 2–7 days. Most people will recover after about a week.

Available treatment7

None

Prevention8

Protective measures and vaccination in accordance with CDC recommendations
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References: 1. About dengue: what you need to know. Dengue. Centers for Disease Control and Prevention. Updated September 23, 2021. Accessed March 13, 2023. https://www.cdc.gov/dengue/about/index.html 2. Dengue. Chapter 4, Travel-Related Diseases. Yellow Book. Centers for Disease Control and Prevention. Updated July 1, 2019. Accessed March 13, 2023. https://wwwnc.cdc.gov/travel/yellowbook/2020/travel-related-infectious-diseases/dengue 3. Zhang H, Zhu Y, Liu Z, et al. A volatile from the skin microbiota of flavivirus-infected hosts promotes mosquito attractiveness. 2022. Cell. 2022;185:2510-2522. doi:10.1016/j.cell.2022.05.016 4. Areas with risk of dengue. Dengue. Centers for Disease Control and Prevention. Updated November 5, 2021. Accessed March 13, 2023. https://www.cdc.gov/dengue/areaswithrisk/index.html 5. Transmission. Dengue. Centers for Disease Control and Prevention. Updated September 26, 2019. Accessed March 13, 2023. https://www.cdc.gov/dengue/transmission/index.html 6. Mosquito bite prevention (United States). Centers for Disease Control and Prevention. October 13, 2016. Accessed March 13, 2023. https://www.cdc.gov/chikungunya/pdfs/fs_mosquito_bite_prevention_us.pdf 7. Symptoms and treatment. Dengue. Centers for Disease Control and Prevention. Updated September 20, 2021. Accessed March 13, 2023. https://www.cdc.gov/dengue/symptoms/index.html 8. Prevention. Dengue. Centers for Disease Control and Prevention. Updated September 30, 2021. Accessed March 13, 2023. https://www.cdc.gov/dengue/prevention/index.html