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The immune system functions as the body's surveillance and defense network. It is composed of a complex array of structures, cells, and mechanisms designed to protect the body from invading microorganisms. A properly functioning immune system maintains health and prevents disease by identifying and eliminating harmful agents such as bacteria, viruses, and other foreign substances that could damage tissues and organs.

Immune System

Immunosuppression is a state where the immune system's effectiveness is reduced, often due to a breakdown in its functions. This weakened state makes an individual highly susceptible to a wide range of infections, illnesses, and diseases.

Immunosuppression

Psychoneuroimmunology is the scientific field dedicated to studying the interactions between psychological factors, such as stress, and the body's immune system. The term was introduced in 1981 in a book that reviewed evidence of associations between the brain, the endocrine system, and the immune system. The field's development was largely spurred by the discovery of a fundamental connection between the central nervous system and the immune system.

Psychoneuroimmunology (PNI)

Lymphocytes are white blood cells produced by the immune system and circulated in the body's fluid as part of the immune response.

Lymphocytes

A college student is experiencing a week of intense academic pressure, including poor sleep and constant anxiety. Towards the end of the week, they develop a severe cold that lasts much longer than usual. Based on the primary function of the body's defense network, which statement best analyzes this situation?

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