Explain the goals of the field of psychoneuroimmunology and evaluate its progress toward these goals.​

A. Psychoneuroimmunology is the multidisciplinary field that focuses on the interactions among behavior, the nervous system, the endocrine system, and the immune system.
B. The goals of the field include an understanding of how each of the areas contribute to disease by establishing a connection between psychological factors and immune function and understanding how immune function relates to disease.
C. Research in psychoneuroimmunology has focused on the connection between psychological factors and immune functioning.
1. The immune system can be conditioned.
2. Experiences can affect immune system function, especially negative experiences such as stress.
3. The link between immune system function and the development of disease has been demonstrated by a few studies in the field of psychoneuroimmunology.
4. Before the field can be considered successful, research must link psychological factors, immune system functioning, and disease.