So here's a question: if you work closely with someone who is fully vaccinated (like in close quarters and masked, but still), but then their unvaccinated spouse turns up covid positive, what happens? The spouse quarantines, obviously, but does the vaccinated work colleague (who has no symptoms) have to quarantine? Do you? Does your family? How far down the line does quarantining go? Does the vaccinated work colleague need to be tested? Do you? Does your family? This can get very involved if we trace all if this through to the end. Where does the line get drawn?