Sunday’s game saw 60,000 fans return to Wembley stadium in London as England played Italy last Sunday. No social distancing was in place and face masks wearing was not mandatory.
However, ticket holders were required to produce a negative coronavirus test to attend the event, a Government pilot to assess the impact of large-scale events.
One fan, who is now self-isolating, told i: “Pretty much every group I know of has at least one positive or isolating.
“It just seems like pretty much everybody caught it.”
Another fan reported that everyone he had attended with contracted the “Wembley variant”.
One person claimed to have taken a lateral flow test on Sunday which had a negative result but tested positive the day after the match.
He wrote in a social media post seen by i: “Goodness knows who got it off me, crammed like sardines in Wembley Park after the game Sunday and the Tube itself and the trains.”
The World Health Organisation (WHO) has criticised the “devastating” lack of coronavirus precautions during the Euro 2020 final.
Maria Van Kerkhove, coronavirus technical lead for the WHO, described “watching transmission happening in front of my eyes”.
Following the event, Ms Van Kerkhove took to Twitter to express her horror at the scenes witnessed.
She wrote: “Am I supposed to be enjoying watching transmission happening in front of my eyes. The Covid-19 pandemic is not taking a break tonight.
“SARSCoV2 DeltaVariant will take advantage of unvaccinated people in crowded settings, unmasked, screaming, shouting, singing. Devastating.”
However, the Prime Minister decided to push through with his decision to allow some 60,000 spectators into the stadium.
Boris Johnson stressed the event would take place in a “careful and controlled manner with testing of everybody who goes there”.