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The
immune system normally provides continuous surveillance of
body processes and acts to remedy imbalances or abnormalities.
It protects the body from the effects of invasion by microorganisms
(e.g. germs) and governs the removal of damaged cells from
body tissue. It also discovers and disposes of abnormal cells
that continually arise within the body. Immune system failure
can lead to vulnerability to infection, and can also allow
tumor cells to grow unchecked. Immune system overactivity
can cause allergic symptoms.
by Catherine E. Myers. Copyright © 2006 Memory Loss and the Brain |
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