My theory is people contract a lot more “deadly” disease than they’ll ever know. It’s just that they have the proper genetic makeup to survive it. We only hear encephalitis deaths. It probably strikes a large portion of the population but most survive. I was probably close to death in college one time when I got something and was deathly ill for a month. Like you say, eventually it wrapped up and I went on with my life.
Wouldn’t it be something if it could be ascertained the real rate of infection was so much higher but a large portion of the population just sloughs it off with little or no symptoms. That would mean all the masks and such were pointless. It’s whats in you that determines your survivability likelihood.