The Hawaii Department of Health has confirmed a travel-related case of the Zika virus on Oahu. This marks the first confirmed case of Zika for the year in Hawaii. There was another travel-related case reported on Oahu in May of the previous year.
Between 2015 and 2019, the Department of Health noted that travel-associated Zika cases were more common, particularly peaking with 25 cases in 2017. So far, there have been no cases of Zika acquired locally in Hawaii.
Zika virus, much like dengue, mostly spreads through bites from infected mosquitoes. Hawaii is home to the mosquito species that can transmit Zika, but the virus itself is not established in the state.
In addition to mosquito transmission, Zika can also spread through sexual contact or from a mother to her baby during pregnancy. This latter route of transmission can result in severe birth defects and complications such as miscarriage or stillbirth.
Common symptoms of Zika include fever, rash, headache, red eyes, and muscle and joint pain. Interestingly, many infected people may experience no symptoms or only mild ones, according to the CDC.
Additionally, the Department of Health confirmed another travel-related case of dengue on Oahu, bringing the total for 2025 to 15 cases based on when symptoms began. Symptoms of dengue can include fever, rash, nausea, vomiting, and body aches, as well as eye pain.
These two cases are unrelated; the affected individuals were exposed while traveling in regions where both viruses are known to circulate.
The Department of Health has initiated outreach and mosquito control measures in the areas impacted. It’s crucial to manage mosquito populations locally to help prevent further spread of both Zika and dengue.
While specific locations on Oahu have not been disclosed, the Department of Health plans to keep monitoring mosquito activity in the areas affected.
Travelers are advised to check for risks related to Zika and dengue prior to their trips. Anyone experiencing symptoms within two weeks of visiting an area known for these viruses should consult a doctor and inform them of potential exposure.
Healthcare providers who suspect Zika or dengue cases are encouraged to call the Disease Reporting Line at 808-586-4586.
