What to know
- In 2024, more than 13 million cases of dengue have been reported in North, Central, and South America and the Caribbean. Dengue transmission in these areas remains high in 2025.
- Outbreaks in areas where dengue is common has increased the number of cases in travelers to those areas and may result in small outbreaks in the continental United States.
- Prevent dengue by avoiding mosquito bites!
Situation summary
Dengue is the most common mosquito-borne disease worldwide. This disease is caused by four distinct but closely related dengue viruses (dengue-1, -2, -3, and -4). Dengue viruses are spread by the bites of infected Aedes species mosquitoes.
In the United States, public health authorities in and declared dengue outbreaks in 2024 that have continued into 2025. The Puerto Rico Department of Health until December 2025, and the Virgin Islands Department of Health about dengue. Local transmission of dengue was reported in 2024 in California, Florida, and Texas. Florida has reported local dengue transmission in 2025.
More information about other countries reporting higher-than-usual numbers of dengue cases can be found on the .
Risk to the United States
Dengue is common in six US territories and freely associated states including Puerto Rico, American Samoa, US Virgin Islands, the Federated States of Micronesia, the Republic of Marshall Islands, and the Republic of Palau.
Locally acquired dengue cases have been detected in Florida, Texas, Hawaii, Arizona, and California.
Dengue outbreaks in areas where dengue is common can increase the risk for dengue to US travelers visiting those areas. When travelers return to the United States infected with dengue virus, mosquitoes can bite them and spread the virus to others. Because the types of mosquitoes that spread dengue are present in some areas of the United States, small chains of transmission and, sometimes, small community outbreaks might occur.
General Public
Everyone can take steps to prevent dengue!
- Prevent mosquito bites.
- Control mosquitoes indoors and outdoors.
- Seek medical care if you have a fever or have symptoms of dengue or severe dengue.
- Before you travel, to help you plan and pack.
See also
