““Emotions also directly modulate the immune system. Studies at the U.S. National Cancer Institute found that natural killer (NK) cells, an important class of immune cells we have already met, are more active in breast cancer patients who are able to express anger, to adopt a fighting stance and who have more social support. NK cells mount an attack on malignant cells and are able to destroy them. These women had significantly less spread of their breast cancer, compared with those who exhibited a less assertive attitude or who had fewer nurturing social connections. The researchers found that emotional factors and social involvement were more important to survival than the degree of disease itself. Many studies, such as the one reported in The British Medical Journal article, fail to appreciate that stress is not only a question of external stimulus but also of individual response. It occurs in the real lives of real persons whose inborn temperament, life history, emotional patterns, physical and mental resources, and social and economic supports vary greatly. As already pointed out, there is no universal stressor. In most cases of breast cancer, the stresses are hidden and chronic. They stem from childhood experiences, early emotional programming and unconscious psychological coping styles. They accumulate over a lifetime to make someone susceptible to disease.””
