Beginning May 12, 2023, the United States will no longer require nonimmigrant foreign nationals to be vaccinated against COVID-19 in order to enter the country by air or by land or sea.
The University of Michigan requires U-M students living in Michigan Housing on the Ann Arbor campus to have received a single dose of bivalent COVID-19 vaccine and to submit that information by May 31, 2023 in Vax Viewer. For details, see the U-M Health Response website.