Cofty,
What I said is an observed phenomenon—in same circumstances not all fall sick, yet some do succumb. Recent example, some nurses who treated Ebola patients died of Ebola—yet many other nurses did not. When I observed the same in the shipping company I worked, I wanted to know more about this, and attended a Community Education Course conducted by BASTYAR UNIVERSITY, Washington. (http://www.bastyr.edu/) Interestingly, there were many physicians and scientists, along with me, attending the same. There is nothing wrong in going out of the conventional belief systems. It thrills me.