And old folks often have very poor diets. That may be why a simple cold can put them in the grave. Interesting thing: Back in the height of the industrial revolution, when many inner-city kids were getting rickets for lack of sunshine, doctors found they did not die from broken bones. They died from pneumonia.

There is a strong correlation between good diet and health. That connection may include getting enough zinc and getting enough quercetin from vegetables for the zinc to get into your cells.