There is no evidence that CV satured in SK, that the whole populace got it and only 9,000 were detected positive, etc.
And there is no evidence that that happened anywhere else either.
Again, as the authors of this study said, all you have to do is do an antibody study and you can find out really quickly. See who has already had it/immune. And if it’s not saturated in SK, it will come back with so many people assymptomatic.