IMO there is only one version of the 'Rona, because the person who came into work sick and gave it to me had many symptoms, and I had Zero(also known as none, "0", zilch, nada). The difference between her and It is likely not even in my control, but I like to think its because I take care of my immune system(zinc, vitamin C/D).
Anyone who has looked at the numbers of sick/deaths could see that unlike the "spanish flu" this disproportionately attacks the very elderly and the immuno-compromised. It makes considerably more sense for the people at high risk to quarantine/isolate, and the healthy people to GET the virus so it can burn through the population.