The Thames Valley District School Board has confirmed one case of COVID-19 at Jack Chambers Public School.
The Middlesex-London Health Unit are currently investigating close contacts and individuals who may have been affected.
The school board announced parents who did not receive a letter indicating their child as a close contact can be assured their child is not considered to be at risk.
Staff and students identified as a close contact will be notified and advised to quarantine at home for 10 days.