Also: South Korea. They seem to have essentially stopped the spread of coronavirus with <0.02% of their population infected. People frequently cite extensive

Also: South Korea. They seem to have essentially stopped the spread of coronavirus with <0.02% of their population infected. People frequently cite extensive testing as the key to Korea's success, but it's not like they've been testing everybody; they've tested about one-half of one percent of the population. And they didn't even take steps nearly as drastic as China did in terms of quarantines and the like. I wish someone could provide good reasons for why they've been so successful at containing this virus. I obviously don't know much about infectious diseases, but it strikes me as really odd that there is a consensus among scientists that this virus will inevitably infect 20% to 70% of the US and the world, when it seems to be pretty well contained at less than 0.02% in China and South Korea. If this virus is so inexorably contagious, shouldn't it at least infect, I don't know, 5% of China/SK? Or at least one percent? I have been looking for answers to this puzzle and have found little or nothing to explain it.