First you have to explain the exponential increases in every other population. And second. there was an exponential increase in SK early on and then they got on contact tracing immediately to nip the propagation in the bug.
Based on the Oxford model, SK was already on gen 19-20 by the time they started working on it and only 2-3 gens from ending anyway. Antibody test is what is needed. You can’t down the world’s economy without extraordinary proof, and without knowing the “silent attack” (assymptomatic + mild) case rate we are going blind globally.