We have opened the door but we have also said that we can close it if needed,” Soeren Riis Paludan, a professor of virology with the Aarhus University in Denmark’s second largest city, told The Associated Press. The tipping point in Denmark to start easing restrictions came when a majority in the age group of 50+ had the two shots, Riis Paludan said. Some have lifted restrictions but will introduce a vaccination passport. On July 19, the British government lifted remaining legal restrictions for England, though it still plans to introduce a vaccination passport for entry into nightclubs and other crowded venues at the end of September. While in many European countries there were pockets of resistance such passes, people used it all the time in Denmark because people trust authorities, Riis Paludan said.