BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS
LYMPH NODES
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 Question 
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 An autoimmune disease is ____ 
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  A loss of immunity 
 
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  A loss of an antigens 
 
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  A loss of self tolerance 
 
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  A loss of blood 
 
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 Explanation: 
Detailed explanation-1: -Autoimmune disease (AIDx) results from failure to sustain tolerance to self molecules. Dozens of AIDx involving one or multiple organ systems afflict 3% or more of people worldwide (>75% women). Predisposing factors for AIDx include genetic background, hormonal status, pathogens, and xenobiotic exposures.
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