Following through on its announcement last November, the Department of Homeland Security (DHS) has implemented the administration's COVID-19 vaccination requirement at land and ferry ports-of-entry as of Jan. 22. These new restrictions mirror those that have applied to air travel since Oct. 25, with one exception: Travelers entering via a land or ferry port-of-entry are not required to complete any pre-entry COVID-19 testing; they must only present proof of vaccination to be admitted. Air travelers are required to present both proof of vaccination and negative test results from a COVID-19 test taken within one day of travel.