One thing that I just read about... People with high cholesterol seem to have a worse time with covid than those with low cholesterol. Apparently the covid attaches to the cholesterol in the blood stream and causes worse effects. I have high cholesterol myself, but my doc has me on meds for it.
So if cholesterol is an issue for you, google search it, read up on it, and keep up on your meds!
That DOES somewhat explain why kids seem to handle it better, kids usually don't have cholesterol problems.