BRUSSELS — The European Union on Monday recommended that its member countries place new travel restrictions on unvaccinated visitors from the United States, a fresh blow to the continent’s ailing tourism sector and a sign that potential measures to curb the spread of the coronavirus might remain in place for months.
The European Council of the European Union, which represents governments of the bloc’s 27 countries, removed the United States from a “safe list” of countries whose residents can travel without requirements such as quarantine and testing.
The change is not mandatory. Each E.U. member state imposes its own travel rules and can decide whether to follow the guidelines or not, so it was not immediately clear which countries, if any, would reintroduce restrictions or when they might begin.
If enforced, the new restrictions would only apply to unvaccinated travelers — the European Council already recommends that all visitors who have been fully inoculated with an…