COVID-19 vaccine requirements for foreign truckers at the U.S.-Canada border still could cause supply-chain disruptions if both countries do not decide to allow exemptions, the head of the Canadian Trucking Alliance (CTA) said on Thursday, Reuters reported. Late on Wednesday, Canada dropped a vaccine mandate for Canadian truckers returning home from the United States that was supposed to kick in on Saturday, but unvaccinated non-Canadians will still be turned back at the border. The United States has signaled, without providing details, that foreign truck drivers will have to show proof of inoculation to enter the United States starting on Jan. 22. So if both countries keep their respective bans on unvaccinated foreign drivers, thousands will be taken off the roads, creating the first policy measure since the pandemic began that could limit cross-border trucking traffic. Read more.