This means Bill's plasma contains B antibodies.
Blood types are determined by the presence or absence of certain antigens. Antigens are substances that can provoke an immune response when foreign substances invade the body. Safe transfusion depends on careful blood typing and cross-matching, as some antigens can trigger the patient's immune system to attack the transfused blood.
HDN occurs when an Rh-negative mother gives birth to a baby with an Rh-positive father. When an Rh-negative mother is sensitized to Rh-positive blood, the mother's immune system produces antibodies that attack the baby, phagocytosing her three cells: neutrophils, monocytes, and eosinophils. Only one. Eosinophils fight allergies and parasitic infections. Of these three neutrophils and monocytes are the most active phagocytes.
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