tbf my mates in London have just had it/have still got it and have been absolutely fine.it isn't "just a cold" for the vaccinated either pete - just had it, it was a bad flu (one day of being ruined, five or six days of complete rest (whilst isolating) to recover)
Some of them have already had COVID, all of them vaccinated and or boosted.
Really does depend on a case to case basis, as it has done all along with little rhyme or reason tbh.
Just giving yourself the best protection, through healthy living and vaccines, is a good approach to hoping you're one of the cases that shrugs it off.