Since we are following the maths, science, and models ( all that fantastic public health stuff ) then may I bring in a proportion. If NSW recorded 156,495 tests : 478 positives then that leaves 8,009,505 non-tests : 24,464 possible positives. So mathematically their could be 24,464 positives cases that have not been tested. If true, they may not know they have it. Why? They are all healthy. So why are the hospitals not saturated and all ICU beds maxed out. I state my case your honour. Open the borders now, with masks, sanitiser and most of the elderly are now vaccinated.