The total number of cases of COVID-19 is up to 86 now at the Greater Essex County District School Board after another three were confirmed Thursday.
A student at East Mersea Public School in Wheatley has tested positive, along with a student at Walkerville Collegiate.
Meanwhile, a staff member at Leamington District Secondary School tested positive for the virus.
The school board has not said if any cohorts of students were dismissed as a result of the latest positive tests.
Both of the students who tested positive are considered cases at high-risk of transmission.