BRUSSELS — Back in June, the European Union urged its member nations to reopen their borders to vacationers from the United States, hoping to give a strengthen to the continent’s ailing tourism sector in the vital summertime year.

It labored. American tourists flocked to the beach locations of Spain and Greece, the countryside of Italy and the streets of Amsterdam and Paris.

But on Monday, the European Union proposed new journey limitations for unvaccinated people from the United States, a response to the alarming surge in coronavirus cases and hospitalizations throughout the Atlantic.

In getting rid of the United States from a “secure checklist” of countries whose citizens can journey without having prerequisites such as quarantine and tests, the European Council of the European Union, which represents governments of the bloc’s 27 nations, signaled that prospective limitations to suppress the distribute of the coronavirus could stay in place