Depends if you agree with the second para below, I think this is all Chelsea are doing and all about opinions, but on this occasion I agree with Chelsea and Gove.
The Cabinet Office minister,
Michael Gove, has said domestic Covid passports are “the right way to go” for some venues so “people can be confident that those who are attending those events are less likely to be carriers of the virus”, specifically referring to Premier League football matches.
He said that if businesses “required a certain level of safety” from customers, then people who refused to get vaccinated should not be surprised if they were “barred” – accusing them of “putting other people’s health and lives at risk” and calling them “selfish”.
The use of vaccine passports could also be introduced in football’s lower leagues as well as other sports in England in an attempt to reduce the spread of the virus following the end of restrictions.
https://www.theguardian.com/footbal...-to-show-proof-of-covid-jabs-to-go-to-matches