In a proclamation from January 18, 2021, President Donald J. Trump announced the end of travel restrictions for people traveling from the Schengen Area, the United Kingdom, the Republic of Ireland, and Brazil to the United States, effective January 26, 2021. These restrictions were originally imposed to prevent the spread of COVID-19. The decision follows the CDC's new requirement for travelers to show proof of a negative COVID-19 test before entering the United States. The removal of restrictions reflects confidence in the cooperation of these regions in managing safe travel and combating the virus, contrasting with ongoing restrictions for China and Iran due to their lack of cooperation.
Simple Explanation
President Trump said people from Europe and Brazil can go to the United States again because they have rules to show they don’t have COVID-19, but people from China and Iran still can’t because they didn't follow the same rules.