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Primary Immune Deficiency Diseases

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Selective Immunoglobulin A (IgA) Deficiency

People with this condition lack immunoglobulin A (IgA), an antibody that protects the mucous membranes, or moist linings, of the eyes, mouth, airways, and digestive tract.

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Last Updated July 17, 2012

Last Reviewed October 15, 2010