As of May 12th, the Department of Homeland Security (DHS) will no longer require COVID-19 vaccination or proof of that vaccination for non-U.S. travelers entering the United States! This is the result of the Title 19 travel restrictions being lifted by Presidential Proclamation signed by President Biden.
Review the DHS News, Press Release for more details: DHS Statement on the Lifting of Title 19 Requirements
Source of Information:
DHS (dhs.gov), 5/1/23, Press Release:
CNN (CNN.com), 5/1/23, News Article: