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Impaired immune system

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content provided by Healthwise

The immune system is the body's natural defense system that helps fight infections. An impaired immune system does not work properly and cannot effectively protect a person against infection.

Some conditions and medicines weaken or impair the immune system. These may include:

  • Alcohol or drug abuse or withdrawal.
  • Certain diseases or conditions. Diabetes, cancer, HIV/AIDS, or conditions in which the body mistakenly identifies its own tissues as harmful (autoimmune disorders) are some examples.
  • Chemotherapy or radiation therapy.
  • Some medicines, such as corticosteroids or those taken to suppress the immune system after an organ transplant.
  • Surgery to remove the spleen (splenectomy).
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Last Updated: May 25, 2007
Author:
Jeannette Curtis

Caroline Rea, RN, BS, MS
Medical Review:
Patrice Burgess, MD - Family Medicine

Adam Husney, MD - Family Medicine

Kathleen Romito, MD - Family Medicine


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