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 now recommended for U.S. territories of American Samoa, Puerto Rico, and the U.S. Virgin Islands, and freely associated states, including the Federated States of Micronesia, the Republic of Marshall Islands, and the Republic of Palau.
Page last reviewed: September 30, 2021