You can easily argue the other point as well, though; namely the fact that many people are naturally immune. Not asymptomatic, but immune.
Make no mistake though,
@Moose84, 1% of the world's population going away would be devastating.
Taking humanity out of it and looking at it like a robot; it would be mainly elderly, "non-contributors", so the world would keep turning just fine. It would actually be the worst in America vs other countries where it would take out a lot of contributing and valuable members of society that we need that just so happened to be obese. Again- looking at it with no humanity (obviously grandma and grandpa bring significant value to our individual wellbeing; but usually not society as a whole). So saying "Countries may not survive otherwise" is factually incorrect.
Have no tourism until Fall 2021 in the Philippines or Vietnam or Thailand and see what that does to those countries. The death toll and destruction of quality of life would surpass anything Corona could have possibly ever done.
Either way, the fall of 2021 talk and next week talk are two ends of the very extreme and we still don't have the data to truly predict. As we have more data, the predictions will be more and more accurate. I wouldn't be surprised to see that fall 2021 become summer, then spring, then winter, then fall 2020 as more and more data comes out. Would you?