Someone at Valley Way Public School in Niagara Falls has tested positive for COVID-19.
It's unclear if it's a student or a staff member but the DSBN will be contacting everyone they came into close contact with.
They will be told to self-isolate for two weeks.
The school underwent a thorough cleaning last night.
Meanwhile the Niagara Catholic District School Board says someone at Saint Michael Catholic High School has also tested positive.
But there is no risk of transmission for the school community because this person has not visited the school since September 22nd.
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