The Hawai‘i Department of Health (DOH) has recently confirmed a new case of dengue virus on Maui, which represents the state's fourth case in 2025. It is a travel-related incident with the patient having been exposed in an area where the disease is more prevalent, according to a news release from the DOH.
In response, DOH teams have implemented mosquito control measures in the affected areas of Maui. They are also reminding the public to follow recommended best practices to help prevent local virus transmission, which mainly involve addressing the mosquitoes that spread the virus. The most recent case involved travel to an unspecified dengue-endemic area, bringing the total number of cases to four—three on Oʻahu and one on Maui.
Dengue outbreaks are common worldwide, particularly in regions such as Central and South America, Asia, the Middle East, Africa, and several Pacific Islands, including U.S. territories like American Samoa, the Federated States of Micronesia, the Republic of the Marshall Islands, and the Republic of Palau. In 2024, Hawaii reported 16 travel-related dengue cases, with travelers originating from regions including Brazil, Argentina, and India.
With travel increasing the risk of dengue transmission, the Centers for Disease Control and Prevention (CDC) has outlined precautions for travelers visiting known dengue areas. These recommendations include using EPA-registered insect repellents, wearing long-sleeved clothing outdoors, and choosing accommodations with air conditioning, screens, or insecticide-treated bed nets. In countries currently experiencing a rise in dengue cases, travelers are advised to review the latest travel advisories at least a month before their trip.
Travelers returning from dengue-endemic areas are advised to remain cautious about mosquito bites for up to three weeks after their return. If symptoms like fever, nausea, or body aches occur within two weeks of arrival, it is recommended to seek medical attention. In regions with confirmed or suspected cases, DOH agents from the Vector Control Branch have been conducting mosquito control efforts to reduce the risk of further transmission. They are also encouraging homeowners to eliminate potential mosquito breeding sites, such as containers and planters that collect water after rainfall.
For additional information on dengue, its symptoms, and mosquito breeding prevention, the public can refer to the official websites of the Disease Outbreak Control Division (DOCD) and the Vector Control Branch (VCB) for guidance and updates.
