When you can prove in a court of law that person "x" infected person "y" at "Z" date/time - then you can say this with even a minimal level of confidence.
Don't want to get sick? Order groceries online and have them delivered to your door.
Don't want to get sick? Order groceries online and have them delivered to your door.
And that since we can’t hold individuals responsible, everyone else needs to alter their behavior?
That is, one infectious person wandering around a grocery store gets to force everyone else to shop online and is not doing anything wrong?