A deficiency is something that fails to meet a particular need or requirement, usually due to a lack or shortage, functional quality or availability.
Other types of deficiency
Acquired Immune Deficiency Syndrome (AIDS)
Acquired immunodeficiency syndrome, or acquired immune deficiency syndrome (or acronym AIDS or Aids), is a collection of symptoms and infections resulting from the specific damage to the immune system caused by infection with the human immunodeficiency virus (HIV). AIDS is a condition that results from the latter stages of advanced HIV infection in humans, thereby leaving compromised individuals prone to opportunistic infections and tumors. Although treatments for both AIDS and HIV exist to slow the virus' progression in a human patient, there is no known cure. (www)
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Last updated: Friday, 2nd March 2012