The Lake Oswego School District sent a robocall to parents saying that Forest Hills Elementary will be closed until Wednesday so it can be deep-cleaned by maintenance workers.
Health authorities planned to spend the weekend scrambling to find everyone the unidentified person, who has been hospitalized, had been in contact with.
Hours before the case emerged, the state ramped up efforts to combat an outbreak amid potential challenges, including closing schools, businesses and events, and sustained shortages of medical supplies.
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