Immunoglobulin A deficiency (IgAD) is the most common primary immune deficiency (Yazdani et al., 2017), defined as serum levels of IgA ≤ 0.07 g/L in individuals >4 years of age who have normal serum levels of other immunoglobulins (Conley et al., 1999; Picard et al., 2015). This evidence concerns the gene CD79A and Immunodeficiency.