With the winter break approaching, there is concern families won't abide by public health recommendations and will gather during the holidays.
"People do gather around that Christmas holiday ... We would have people potentially coming back to school who may have engaged in a gathering larger than you're supposed to, increasing the risk [to others] and they would be asymptomatic, so it wouldn't necessarily be caught by screening," Danko said.
Education Minister Stephen Lecce said in a statement on Friday afternoon that "as we continue to see increased rates of community transmission, our schools remain safe."
"To put this into perspective — eight out of ten schools in this province have no active COVID-19 cases at all and 99.66 per cent of students have never reported a case of COVID-19," he said.