The European Continent on Tuesday reopened to visitors from 14 countries but not the U.S., where some of the states that pushed hardest and earliest to reopen their economies are now in retreat because of an alarming surge in confirmed coronavirus infections. … The EU extended its ban on visitors not just from the U.S. but from China and from countries such as Russia, Brazil and India where infections are running high. Britain dropped out of the EU in January and maintains its own rules, requiring arriving travelers to go into 14-day self-quarantine. President Donald Trump suspended the entry of most Europeans in March.