By Ceylan Yeginsu, with Aina Jabeen Khan contributing from London.
In Britain and Denmark most coronavirus restrictions have been lifted, including mask mandates; Austria and the Netherlands have eased lockdown measures despite surges in cases, and in late January, the European Union recommended that vaccinated residents should not be required to undergo testing or quarantine when traveling between the 27 member states.
In the United States, major travel industry groups have called on the federal government to eliminate the testing requirement for U.S.-bound vaccinated travelers, saying that the measures fail to . . .