The Hawaii Department of Health announced on Mar. 27 that a new travel-related dengue virus case has been identified on Oʻahu, raising the state’s total number of cases to four for 2026. The department said the individual contracted the virus while traveling in an area where dengue is common.
Officials said the risk of local transmission remains low due to specifics of this case. However, they advised residents to remove standing water following recent storms as a preventive measure against mosquito breeding and potential spread of vector-borne diseases.
Dengue is transmitted when a mosquito bites an infected person and then spreads it to others. While mosquitoes capable of carrying dengue exist in Hawaii, officials said the disease is not established locally and current cases are linked only to travelers. In response, Department of Health teams have been deployed for inspections and public outreach.
The Centers for Disease Control and Prevention recommends that travelers use insect repellent registered with the Environmental Protection Agency, wear long-sleeved clothing outdoors, and sleep in protected environments when visiting areas where dengue is present. Returning travelers should continue precautions against mosquito bites for three weeks after their trip and seek medical evaluation if symptoms develop within two weeks.
According to the official website, the Hawaii State Department of Health contributes to community well-being by promoting health education on vaccination and disease outbreaks through its Disease Outbreak Control Division according to the official website. The department aims to safeguard health conditions through prevention efforts per its official website and operates under leadership including a director supported by deputy directors managing key programs as noted online. Programs extend across multiple islands as outlined by DOH, with preparedness coordinated by its Office of Public Health Preparedness as detailed online. The agency delivers comprehensive services focused on health protection statewide according to its website.
DOH personnel from the Vector Control Branch conduct inspections and activities aimed at reducing mosquitoes in areas with suspected or confirmed cases. Officials encourage everyone—especially those living without reported cases nearby—to eliminate standing water around homes or workplaces as even small amounts can support mosquito breeding.
