The State Department has lifted its Level 4 global travel advisory, the highest warning against U.S. citizens traveling internationally, citing changing conditions in the coronavirus pandemic. … The previous advisory had been in place since March 19. … While the U.S. has decided to relax its universal advisory, many nations are restricting U.S. citizens from entering because of the high number of coronavirus cases still being reported within U.S. borders. Some of the most popular travel destinations for U.S. tourists, including Canada, Mexico and the European Union, have imposed strict restrictions.