689 students in Windsor-Essex have been suspended because of incomplete immunization records.
The students are in Grades 11 and 12.
Suspensions went into effect at 8am
In early December, the health unit sent out 8,200 notices to students with incomplete records.
Suspended students have two ways to update their immunization records either by having a health care provider call or fax proof of immunization to the health unit or bringing the proof of immunization in person.