Residents at a local vaccine clinic may have received saline solution instead of the COVID-19 vaccine.
That was acting Medical Officer of Health, Dr. Alex Hukowich.
He added there are steps in place to reduce errors, and to catch any should they occur.
Other than a possible sore arm, Dr. Huckowich says there is no health risk associated with receiving saline solution.
The health unit did not disclose which clinic or date was involved. Those affected have been contacted by the Haldimand-Norfolk Health Unit to schedule another shot.