“Effective today, all U.S. and Canadian cross-border truckers must show their vaccination passport in order to deliver their loads.  Approximately 15% of Canadian truckers and approximately 50% of U.S. truckers are not vaccinated.   The logistics and distribution of food supplies into and out of Canada are collapsing.”

To say politicians and bureaucrats aren't very bright would be entirely too charitable.

https://theconservativetreehouse.com/blog/2022/01/22/calgary-starts-to-feel-the-pain-of-u-s-canada-government-vaccine-mandate-on-truckers/