The Hawaii Department of Health has identified another travel-related dengue case on Oahu.
The latest case comes two weeks after this year’s second case, bringing the total to three so far in 2026 – with two on Oahu and one on Maui. All three were exposed to the virus while traveling in a region where dengue is common.
DOH said teams have been deployed to the affected area to conduct inspections and implement mosquito control measures, without specifying where on Oahu.
Dengue — a viral illness spread through mosquito bites — is a year-round risk in many parts of the world, including the tropical and subtropical areas of Central and South America; Asia; the Middle East; Africa; Puerto Rico; American Samoa, Micronesia, the Marshall Islands and Palau.
Travelers returning from dengue-endemic areas should take precautions to prevent mosquito bites for three weeks, DOH said.
If symptoms of dengue — such as fever, nausea, vomiting, rash and body aches — develop within two weeks of return from dengue-affected areas, residents should seek medical evaluation.
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While Hawaii is home to Aedes mosquitoes, which can carry dengue, the disease is not endemic in the state.
Anyone who suspects a dengue infection should call the DOH Disease Reporting Line at 808-586-4586.