Four cases of the virus was confirmed at Listowel District Secondary School on September 22nd with one case on September 17th.
Public health has listed the cases in Listowel as an active outbreak, though class closures are not in effect.
This also includes positive cases at FE Madill in Wingham and Goderich District Collegiate.
There is currently one case affecting Exeter Public and Central Perth Elementary school being monitored.