The Simcoe County Catholic school board notified parents of two COVID-19 cases at St. Charles Catholic School in Bradford.
The health unit is working closely with the board to prevent further spread in the school.
Two classes were closed as a result, but the school remains open.
The health unit will send an email to any families whose child may have been exposed.
As of Wednesday morning, the Catholic board lists a total of seven positive cases in five of its schools, including the above mentioned.
For a complete list of COVID-19 cases in schools across the region, click here.