Frequently Asked Questions: Guidance for Travelers to Enter the U.S
https://www.dhs.gov/news/2021/10/29/frequently-asked-questions-guidance-travelers-enter-us
WEBOct 29, 2021 · Updated Date: April 21, 2022. Since January 22, 2022, DHS has required 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 proof of vaccination upon request.
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