Cost of illness

A note for Lesson no. 5, "Your Brain Secretly Works With Other Brains," in Seven and a Half Lessons About the Brain by Lisa Feldman Barrett.
Some context from page 95 is:

We pay the costs of increased health care for illnesses, like diabetes, cancer, depression, heart disease, and Alzheimer’s disease, that are worsened by chronic stress.

What is this?

For the cost of illness in the United States per year, see these statistics compiled by the U.S. Centers for Disease Control and Prevention (CDC).