Selective immunoglobulin a deficiency
What is Selective immunoglobulin a deficiency?
Selective immunoglobulin A (IgA) deficiency (SIGAD) is a relatively mild genetic immunodeficiency. People with this deficiency lack immunoglobulin A (IgA), a type of antibody that protects against infections of the mucous membranes lining the mouth, airways, and digestive tract.
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