Evolution could explain the placebo effect

Leukemia treatment - immune system T-cells (ce...
Leukemia treatment – immune system T-cells (center) binding to beads which cause the cells to divide (Photo credit: Microbe World)

“New evidence from a computer model offers a possible evolutionary explanation, and suggests that the immune system has an on-off switch controlled by the mind.” (New Scientist)

What your crutch words say about you

Determination.  Or is There Another Word For It?

In point of fact… (The Atlantic)