Immunoglobulin (Ig) A deficiency is characterized by undetectable levels of serum IgA and normal levels of other immunoglobulins (IgG. IgM) in patients more than 4 years of age. Although generally asymptomatic. pa- tients are at risk for anaphylactic reactions when receiv- ing allogeneic blood products from non-IgA deficient donors. https://jalyttlers.shop/product-category/highball-glasses/