Secretary of State Antony Blinken has said that the U.S. is looking to the advice of medical experts on the best course of action, but that a group of American and European officials are working together on an agreement. But critics say the administration needs to move faster, slamming travel bans as unrelated to the spread of COVID-19 and raising concern about the loss of revenue from international business travel, summer vacations and foreign students trying to arrive before the fall semester. The administration’s travel bans are “frozen in time,” said Steve Shur, president of the Travel Technology Association, a trade organization that partners with online travel agents, airlines and hotels.