Public Health Ontario says all but 2 cases were in people who weren't immunized against the disease. The agency says between 2013 and 2023, the province didn't record more than 22 cases in any one year.
Public Health Ontario says all but 2 cases were in people who weren't immunized against the disease. The agency says between 2013 and 2023, the province didn't record more than 22 cases in any one year.