Awaiting orders to retaliate

(Medical Xpress) -- When immune system B cells are alerted to the presence of a threat within the body, they form structures called germinal centers, which serve as ad hoc headquarters for marshaling a targeted immune response. These cells subsequently differentiate into plasma cells, which produce antibodies directed against foreign entities, or memory cells, which retain the capacity to become plasma cells if the same threat reappears in the future.

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