My father's parents were Irish. Only a year before my father died, he and I went back to Ireland for a week to look at the old homestead.
Astonishingly, in spite of decades of research, there is no agreed theory of cancer, no explanation for why, inside almost all healthy cells, there lurks a highly efficient cancer subroutine that can be activated by a variety of agents - radiation, chemicals, inflammation and infection.
Although I've had several major career changes, I was extremely hesitant about making some of them.

