On January 20, 2022, in a press release, U.S. Department of Homeland Security (DHS) announced that “non-U.S. individuals seeking to enter the United States via land ports of entry and ferry terminals at the U.S.-Mexico and U.S.-Canada borders to be fully vaccinated for COVID-19 and provide related proof of vaccination.” This restriction applies for both essential and non-essential travel beginning on January 22, 2022. COVID-19 testing is not required.
Details on required documentation can be found in the press release here:
A fact sheet on this guidance can be found here:
The Federal Register Notice can be found here: