Zika Virus Has Been Detected in the U.S.—What Travelers Should Know.

If you’re headed to Oahu this summer, be aware that a mosquito-borne menace is back on the island.

For the first time since 2019, Zika virus has been detected on Oahu, with the Hawaii Department of Health confirming one case. There are also two other suspected exposures to the Zika virus. The one case of Zika was imported into Hawaii by a traveler and did not originate on the island. It is not endemic in Hawaii.

However, the virus is capable of spreading from an infected person, to a mosquito, and on to another person. Hawaii does have the type of mosquitos that can spread Zika, but the virus is not established in the state.

“The DOH asks for support in reducing the potential for the spread of Zika virus, which is carried by mosquitoes. Vector control teams are responding and will continue operations in areas where the individuals spent time, including neighborhoods in Waialua/Haleʻiwa area on Oʻahu,” the Hawaii Department of Heath said in a statement obtained by Travel + Leisure. “DOH will continue to monitor mosquito activity in the affected areas and implement further control measures as needed.”

Symptoms of Zika virus can include fever, rash, headache, joint pain, and pink eye. However, about 80 percent of Zika cases are asymptomatic, according to the Hawaii Department of Health. The virus is particularly dangerous for pregnant women, as it can be passed to their fetus and cause serious birth defects and pregnancy complications.

Zika is mostly spread by mosquitos who have already bitten someone infected with Zika. It can also be spread through sexual contact. Other less common but possible means of transmission are infected blood transfusions, infected organ transplants, breastfeeding, or occupational exposure in healthcare settings.

The Department of Health is encouraging both visitors and residents to take measures to prevent the spread of Zika by applying EPA-approved insect repellent on exposed skin, keeping mosquitos out of buildings by making sure doors close properly, wearing loose-fitting clothing, and removing standing water around buildings that can become a breeding ground for mosquitos.

“Travelers should take precautions to avoid mosquito bites during their trips, and for three weeks after returning,” the statement from the DOH states. “Travelers returning from an area with risk of Zika should take steps to prevent mosquito bites for three weeks after their return. Anyone experiencing symptoms within two weeks after visiting an area with risk of Zika should consult a health care provider and inform them of possible exposure in a Zika-affected area. Testing is not routinely recommended for travelers who do not have symptoms.”

Oahu is the third largest of Hawaii’s islands, and contains the capital of Honolulu. It’s world-famous for its pristine beaches (including Waikiki Beach), luxury hotels, and excellent surfing opportunities.