Fred99:
(edit) - if we haven't managed to isolate quarantined arrivals from each other, and this case is contagion from one infected arrival to another, then we may as well not bother quarantining anybody - we're wasting out time.
@Fred99 indeed add that some at these quarantine facilities felt they would be safer from contagion (or spreading it if they were infectious) if they were in self isolation which of course would not cost the tax payer
And how much community infection that occurred can be attributed to those that came in before quarantine (like myself) but were in responsible self isolation?