In a statement issued Sunday afternoon, health officials said the Saunders Secondary School community has been notified about the positive screen and public health staff will follow up with close contacts.
The health unit says no additional classes will be cancelled and the school will remain open.
As of Sunday, the total number of screened variant positive cases in the region sits at 19, with now five confirmed to involve a variant.
There’s no word on what the strain is in this case, but the previous four were linked to the variant B.1.1.7, first detected in the U.K.
MLHU says all COVID-19 positive tests are now screened to identify the possible presence of one of the more highly transmissible variants of concern.
The tests that screen positive for a variant are analyzed further to confirm the strain.
Health officials say the analysis to confirm a variant-positive test can take several weeks.
Eight new coronavirus cases were reported in London and Middlesex on Sunday. The region’s case total now sits at 6,286.