The most common form of immunodeficiency is
A) X-linked agammaglobulinemia.
B) severe combined immunodeficiency disease (SCID).
C) selective immunoglobulin A (IgA) deficiency disease.
D) CVID.

Question

Quizplus · Accepted Answer

Patients with selective IgA deficiency fail to produce the normal levels of IgA. Failure of B-cells to produce adequate levels of IgA is the most common immunologic defect in the general population. The most common risk factor for the disease is a family history of either IgA deficiency or CVID.

The Most Common Form of Immunodeficiency Is