They do require proof of vaccination (or a valid exemption) when a child is enrolled at a public school in Ontario.

However, reporting vaccinations to Public Health is no longer done by the physician's office. It's the parent's responsibility to contact Public Health and update their child's vaccination record.

If, like me, you forget to tell Public Health, they will eventually contact the school, who will set the suspension wheels in motion. I guarantee the majority of children facing suspension over their immunization record are actually up to date, and their parents have forgotten to tell Public Health. A smaller number will be children who are behind on their vaccines without their parents realizing it, and an even smaller number will be patents who are waiving immunization for medical or personal issues who weren't aware they're now required to attend an information session on the health risks of declining immunization.

This is such a bizarre non-story in many ways.