Algoma Public Health's warning thousands of students are facing suspension without updated immunizations and records.
Emphasizing "high levels of vaccination contribute to herd immunity which keeps dangerous diseases away from our children", the local health unit says it's sending out about 4000 letters and suspension orders to parents and guardians in Algoma whose child does not have up-to-date immunization records, either because they haven't received an update or because they're overdue for one or more vaccines.
Ontario law requires youth under age 18 to have received certain vaccines or have a valid exemption on file or be suspended up to 20 days, which would continue to happen if the information's not received.
Suspensions are set to start in the spring.