Point I saw raised with care homes was that support staff can’t help but bring it in. There’s no such thing as a bubble when you account for delivery drivers, nurses, repair men, family just breaking the rules once, etc.I happen to believe that one of the lessons from Lockdown 1 is that it *worked* in bringing cases/hospital admissions/deaths DOWN. The drive to save the economy meant that it was eased too fast, too soon, which is causing this second spike (in many areas). But MUCH of that is due to household mixing, not students having a bit of a Freshers party.
I worry about the idea you can just isolate people effectively.