Immunoglobulins, also known as antibodies, are glycoprotein molecules produced by plasma cells (white blood cells). They act as a critical part of the immune response by specifically recognizing and binding to particular antigens, such as bacteria or viruses, and aiding in their destruction. Immunoglobulin preparations in the form of antibody concentrates are used for the treatment of patients with a congenital (primary) or acquired antibody deficiencies, as well as for patients with autoimmune diseases. In comparison with blood, these preparations contain five or ten times the quantity of IgG antibodies per milliliter of liquid. In this way, many millions of antibodies can be administered within a short time when required to support the body’s immune defense, to inhibit inflammatory processes and to support tissue regeneration.The preparations are obtained from human blood plasma, are virus-inactivated, purified of unwanted secondary substances and concentrated. The collection of the plasma and also the production of immunoglobulin preparations are subject to stringent national and international guidelines.