I'd reply back to the group and remind everyone that the jab is only good for about 6 months, so if they got theirs in June or earlier they also need to make sure they get a booster or else they're just as dangerous as the unvaxxed.

=)

I might be a selfish, infectious walking unmasked super spreader of not-chinese-bioweapon-it-came-from-bats murder viruses, but that doesn't mean I can't be helpful!