mRNA booster vaccines can be tweaked as such to cater for new variants so shouldn’t be a disaster in the West. No doubt they are already working on it.
2022/2023 was always going to be a case of cat and mouse with variants and outbreaks. We need to sort of cycle out of the exit phase with numerous bumps along the way. It will die off eventually......
If it’s going to trigger a firm border again, Keep the nations border shut to protect the state borders. We cannot go back to what we are now getting out of. I can see some states shutting off to the world again.