OLATHE, Kan. (AP) — Health officials say a Johnson County resident who traveled to an area where mosquitoes are spreading Zika virus is the county’s first case of the virus.

The county health department didn’t provide details about the returned traveler or the travel destination. The Kansas City Star reports that the county health department says the risk of contracting Zika in the area is extremely low.

State health officials said in March that an adult from southwest Kansas was the state’s first confirmed case of the Zika virus. That person also had traveled to a country with “local Zika virus transmission.”

The Zika virus is spread mainly by a tropical mosquito and causes a mild illness in most people. But infection during pregnancy can cause fetal deaths and birth defects.