A COVID-19 outbreak has been declared at Waterloo Collegiate Institute.
It comes as two students in the same cohort have tested positive.
The first positive case was reported earlier this week, and at the time, high-risk contacts were advised to self-isolate.
Although a second case has now been confirmed, no additional staff or students are required to go into quarantine.
The outbreak is not school-wide and only applies to the affected cohort.