Up until the late spring of 2019, I figured that for a relatively old codger, I was in pretty good health.

I took no medications, my blood pressure and weight were fine, I very seldom had a cold and hadn’t had the flu in many years.

But as an example of how one’s health can take an unexpected turn, I developed a groin rash (the crude term is “jock itch”) that defied the prescription cream that my doctor, Joseph Zeno, seemed to believe would cure the problem.

After some months of using this cream during which I also experienced a general feeling of malaise, Dr. Zeno said, “We have to get to the bottom of this… I’m going to send you to a dermatologist.”