I personally know three people who have died from COVID but none of the three was in great health to begin with.
One I served with, he was a disabled vet with serious back issues, was overweight, and slept with a CPAP.
Another I knew from my strength sport days, he was overweight and had heart issues. He barely survived a widowmaker a few years ago.
The third was on death's door three times before due to serious motorcycle accidents and had a slew of health issues because of it.
All three had serious underlying issues before getting sick.