A Washington County adult has tested positive for coronavirus in Oregon’s first case, officials said Friday. The test needs to be confirmed by federal health officials.

The employee of Lake Oswego’s Forest Hills Elementary lives in Washington County and is isolated at Kaiser Permanente Westside Medical Center in Hillsboro in what state health officials described Friday as a case of an unexplained transmission of the disease.

CORONAVIRUS IN OREGON: FULL COVERAGE

The patient hadn’t been under monitoring for coronavirus symptoms and doesn’t appear to have traveled to any of the countries with outbreaks or have associated with anyone who did, Oregon Health Authority officials said.

That means the person could have caught the disease from someone in the community.

The state did not disclose the person’s age, gender or condition, citing privacy reasons. The person first showed symptoms Feb. 19.

“Our first concern is for this individual, to make sure they’re being cared for and is able to recover,” said Oregon Health Authority Director Patrick Allen. “Our next priority is finding out who this individual had contact with and make sure they know about their risks.”

The person first had symptoms Feb. 19, the agency said in a statement. A sample from them was collected and sent to a laboratory in Hillsboro, which used a test kit provided by the U.S. Centers for Disease Control and Prevention.

Now, the school district is shutting Forest Hills, a school with 25 teachers on staff and about 430 students in kindergarten through fifth grade, until Wednesday, March 4. The school will undergo a deep clean and all activities will be canceled, district spokeswoman Mary Kay Larson said in a statement. Health officials will talk to employees and let families know their children could have been exposed.