You can go back to life-as-normal.
The risk that plague rats pose is not to the vaxxed people, but to society. Mask mandates and shut-downs continue, and new variants will emerge. And those - like our family friend - who have an auto-immune disorder and cannot be vaxxed will be at risk as long as the plague is with us.
So thanks for exercising whatever bullshit "personal freedom" idea you cling to, and being profoundly selfish. Thanks.