It joins other sporting events such as Wimbledon and the European Championship in a British government research program studying the effects of fan attendance as COVID-19 restrictions are eased.
The Delta variant has also been behind a steep upward curve in cases in the United Kingdom but that did not stop authorities easing restrictions for England's last-16 win over Germany on Tuesday.
The tournament represents a major step forward on the path toward recovery after one of the darkest chapters in the continent’s history since World War II.
The French are now allowed to go further than the 10-kilometre from home limit that has been applied for four weeks in efforts to slow down the spreading of the virus.
Europe recorded 1 million new COVID-19 cases last week, an increase of 9% from the previous week and a reversal that ended a six-week decline in new infections, WHO said Thursday.
Slow off the blocks in the race to immunize its citizens against COVID-19, Germany faces an unfamiliar problem: a glut of vaccines and not enough arms to inject them into.
Europe was the first global region to clock half-a-million deaths on December 17.