Beginning January 22, 2022, the US Department of Homeland Security (DHS) will require non-US individuals seeking to enter the US via land ports of entry and ferry terminals at the US-Mexico and US-Canada borders to be fully vaccinated against COVID-19 and provide related proof of vaccination. These new restrictions will apply to non-US individuals who are traveling for essential and non-essential reasons. They will not apply to US citizens, Lawful Permanent Residents, or US nationals.
Please see the DHS published notice for more information: https://www.dhs.gov/news/2022/01/20/dhs-require-non-us-individual-travelers-entering-united-states-land-ports-entry-and
