Public Health Agency of Canada states that 21 cases of COVID subvariant XBB.1.5 have been detected in Canada. If the U.S. is any indication, there will be many more cases to come. Border screening may slow but not stop exponential increases in cases.

Medical Mythbusting Commentary for January 5, 2023

Source:
21 cases of COVID subvariant XBB.1.5 detected in Canada, says PHAC