Psychoneuroimmunology has emerged as a discipline advancing our knowledge of the relationships among psychosocial factors, the central nervous system, the immune system, and disease. The growing volume of evidence suggests that psychological states, including exposure to stressors and the presence of depressive states, may influence health and disease by altering immunologic states.

Psychoneuroimmunology, a collaborative work of 50 international experts, expands on the American Psychiatric Association's symposium on this topic to present never-before-compiled scientific research from...