The United States reopened its land border to Canadians who are fully vaccinated against COVID-19 on Nov. 8, but a negative PCR test for any trip appeared to be a deterrent.
要求旅客提供小于72小时的证明：Travellers will be responsible for maintaining proof of the 72-hour period to show airline/rail companies and border officials as required (e.g., boarding pass, travel itinerary). 自己开车怎么证明呢？
-geekcode(文心雕码);
2021-11-21(#14128062@0)
