What We Know
Prevent dengue by avoiding mosquito bites.
- All four dengue viruses are spread primarily through the bite of an infected Aedes species (Ae. aegypti and Ae. albopictus) mosquito. These mosquitoes also spread chikungunya and Zika viruses.
- The mosquitoes that spread dengue are found in most tropical and subtropical regions of the world, including many parts of the United States.
- Ae. aegypti and Ae. albopictus bite during the day and night.
- A dengue vaccine is available for use in some parts of the world, including United States territories.
Page last reviewed: June 20, 2019