BackgroundPrimary immunodeficiencies are heritable defects in immune system function. Antibody deficiency is the most common form of primary immunodeficiency in humans. can be caused by abnormalities in both the development and activation of B cells. and may result from B-cell-intrinsic defects or defective responses by other cells relevant to humoral immunity. https://www.hcbcyouthleadersummit.com/product-category/restoring-shampoo/