Immune deficiency

Immune deficiency

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The child's defenses use several categories of cells: white blood cells (polynuclear, lymphocytes and macrophages) responsible for devouring the microbes and B cells that produce antibodies (immunoglobulin A (Ig A) in the mucous membranes and Ig G throughout the body).
A mild immune deficiency is very common in the first years of life. IgA deficiency can lead to diarrhea and mucosal infections. That in Ig G causes frequent respiratory infections.

More about baby's immune system