At this time, anyone returning from international travel is required to do the following according to the CDC.
According to the CDC:
To reduce the risk of further spread of variant strains in the United States, people who have been vaccinated should still follow CDC’s travel recommendations and requirements before, during, and after travel. This includes all travel-related testing and quarantine recommendations and requirements, such as pre-travel and post-travel testing recommendations, the pre-departure testing requirement for international air passengers to the United States, and the recommended stay-at-home (self-quarantine) period after travel.
All international air passengers (aged 2 years or older) traveling to the U.S., regardless of vaccination or antibody status, are required to show a negative COVID-19 test result or documentation of recovery from COVID-19. Those departing from or traveling within the United States are also recommended to get tested before traveling.
All travelers, regardless of vaccination status, should get tested 3–5 days after travel and stay home and self-quarantine for 7 days after travel, even if their test is negative. Travelers who don’t get tested should stay home and self-quarantine for 10 days after travel. Travelers who test positive or develop symptoms of COVID-19 should isolate and follow public health recommendations.
According to U.S.-Canada and U.S.-Mexico Border Notices, the Canada and Mexico land port (car, commuter rail, or ferry) of entry permits as coming for essential travel "Individuals traveling to attend educational institutions." While students can go through the border, tourism is not permitted. This was extended again until 21 March 2021.
For more information, see the link below.
According to the CDC: To reduce introduction and spread of new variants of SARS-CoV-2, the CDC issued an Order effective January 26, 2021. It requires all air passengers arriving to the US from a foreign country to get tested for COVID-19 infection no more than 3 days before their flight departs and to provide proof of the negative result or documentation of having recovered from COVID-19 to the airline before boarding the flight.
In addition to testing, non-U.S. citizens from the following countries are banned from entering the U.S. according to the updated Presidential proclamations: China, Iran, European Schengen Area, Ireland and United Kingdom, Brazil, and South Africa.
Announcing Additions to the National Interest Exceptions: Travel in the national interest of the United States includes travel on a temporary basis that provides a substantial benefit to the U.S. economy including certain categories of students, academics, as well as certain business travelers, investors, treaty traders.
STUDENTS – F1, M1 and their dependents
F-1 or M-1 students and others traveling from Brazil, China, Iran, and South Africa are not included in this special Schengen Area/UK/Ireland NIE policy, and must qualify for an NIE on an individual, case-by-case basis.