It seems to me there is a direct correlation between population density and infection rates. In WA, SA and most of Australia with the odd exception most of the cases in the community didn't lead to mass outbreaks, similarly in Scandanavia where pop density is low Norway and Finland have had no increase in average annual deaths, even Sweden who didn't lock down have fared better than a lot of places and most of their cases are in Stockholm where pop density is higher. In Spain and Italy where a lot of people live in apartments even in smaller towns it has spread like wildfire, similar in New York, London and on a smaller scale cruise ships. The virus feeds on itself and the more concentrated it is in a community the more virulent it seems to be.That is incredibly good news. If we've rolled out antibody testing (assuming it's in the hundreds at least) towards possible past carriers and only picked up two (along with zero new active cases), then it's strong evidence community transmission is minimal.
We have much to be thankful for.