What to know
- In 2024, over 10 million cases of dengue have been reported in North, Central, and South America and the Caribbean.
- 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 avoiding mosquito bites!
- In 2024, over 10 million cases of dengue have been reported in North, Central, and South America and the Caribbean.
- 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 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 Puerto Rico declared an outbreak in March 2024. Local transmission of dengue has also been reported in 2024 in the US Virgin Islands and Florida.
More information about other countries reporting higher-than-usual numbers of dengue cases can be found on the Global Dengue page.
Health Advisory
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.
Large outbreaks of dengue can increase the risk the number of dengue cases in US travelers. Because of the increased number of travel-associated cases and because the types of mosquitoes that spread dengue are present in some areas of the United States, small 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, find country-specific travel information to help you plan and pack.
