The US Department of Homeland Security revealed that foreigners wishing to enter the country through its land borders, regardless of the reason for their trip, must be fully vaccinated against COVID-19 as of Saturday. 

The Department of Security said that the new measure aims to limit the spread of coronavirus infection in the country: “Starting January 22, 2022, the Department of Homeland Security will require non-US individuals who enter the United States through land ports of entry, or ferry terminals along our northern and southern borders. to be fully vaccinated against COVID-19 and to be prepared to show vaccination certificates.”

National Security Secretary Alejandro Mallorcas said in a statement that travelers should "prepare to show relevant evidence of vaccination."

US citizens and permanent residents do not need to show proof of vaccination if they enter by land or ferry.

The United States, which largely closed its borders to the outside world at the start of the pandemic, reopened its doors to most travelers in November, provided they are vaccinated.

Foreigners arriving by land or ferry from Mexico and Canada for "essential" flights were previously exempted, mainly for professional reasons, but that exemption will expire on Saturday, and will particularly affect travelers who live and work on both sides of the Canadian-US or Mexican-US border.