A northwest Oregon resident has tested positive for coronavirus with no known history of travel to countries severely affected by the outbreak and no known contact with infected individuals, state health officials said Friday.

The case, in Washington County, marks the third case of unknown origin in the United States and indicates that the virus is spreading. It is also the first coronavirus case in Oregon…

Oregon Health Authority Director Patrick Allen said the case is considered “presumptive” while the state awaits confirmation of test results from the Centers for Disease Control and Prevention. The patient was recently at a local elementary school, Allen said.

Earlier Friday, health officials in Santa Clara County, Calif., said a 65-year-old resident also had a case of coronavirus with unknown origin — becoming the second U.S. case of community transmission. The nation’s first community-transmission patient was a woman in Solano County, about 90 miles away.