The Hawai‘i Department of Health (DOH) has confirmed a new travel-related case of dengue virus on Oʻahu, marking the second case in the state for 2025. The individual contracted the virus while traveling in a region where dengue is prevalent.
DOH teams are conducting inspections and implementing mosquito control measures in the affected area. The public is advised to follow best practices to prevent local transmission.
Dengue virus spreads from an infected person to a mosquito, which then transmits it to another person. Although Hawai‘i has mosquitoes capable of carrying dengue, the disease is not endemic in the state, with cases currently limited to travelers. Several regions worldwide are experiencing increased dengue activity.
Dengue outbreaks occur globally, including in Central and South America, Asia (including the Republic of the Philippines), the Middle East, Africa, and several Pacific Islands such as U.S. territories like American Samoa and others. Popular tourist destinations in the Caribbean, including Puerto Rico, are also affected.
In 2024, Hawai‘i reported 16 dengue cases linked to travel to countries such as Brazil, Argentina, Costa Rica, El Salvador, Guatemala, Mexico, Puerto Rico, Honduras, Indonesia, Thailand, Japan, Philippines and India—all areas where dengue is endemic.
Travelers to areas with dengue risk should take precautions as advised by the Centers for Disease Control and Prevention (CDC). This includes using EPA-registered insect repellent and wearing protective clothing outdoors. Travelers should check country-specific travel information for guidance on dengue risk before traveling.
Returning travelers from dengue-endemic areas should avoid mosquito bites for three weeks. If symptoms develop within two weeks of return, medical evaluation is recommended.
Dengue symptoms range from mild to severe and include fever and body aches. Most people recover within a week. Individuals with recent travel history experiencing these symptoms should contact their healthcare provider.
In suspected or confirmed dengue areas, DOH personnel conduct inspections and mosquito-reduction activities. Reducing mosquito populations decreases transmission risk. In unaffected areas, eliminating breeding sites around homes helps prevent outbreaks.
Mosquitoes breed in small amounts of standing water found in common sites like buckets or planters. Removing standing water can significantly reduce breeding potential.
For more information visit DOCD and VCB websites.