A teacher at a school in Oakland County is one of the 25 people in Michigan who have been identified as having the coronavirus.

Few details were revealed about the teacher or school during a press conference held by Oakland County Executive Dave Coulter and county health officials.

Gov. Gretchen Whitmer on Thursday ordered all K-12 public and private schools across the state to close to slow the spread of the virus.

Also Friday, Dearborn Public Schools announced that one of its teachers, whose exposure to someone with coronavirus forced the closure of a school this week, has now tested positive for the virus.

But school officials say that Wayne County health department officials say that the teacher wasn’t contagious while in the school, Whitmore-Bolles Elementary School in Dearborn.

“Therefore, our students were not exposed to the COVID-19 virus at school,” a press release from the district said.

The teacher in Oakland County who has tested positive, who has a history of travel, lives in Washtenaw County, said Russell Faust, the Oakland County medical director.

“They attended school as a teacher Monday,” he said during the press conference, a video of which was posted on the county’s website. “So, it exposed not only the kids in the class but their colleagues. They had lunch with colleagues.”

Faust would not identify the school. But media reports say officials at Hillel Day School of Metropolitan Detroit in Farmington Hills confirmed the person taught there.

Those who were exposed to the teacher are being tested, Faust said.