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Flow alterations to give complete filling of the lymphatic sinusoidal system and saccular lymph spaces around the germinal centers were demonstrated during a primary immune reaction. By contrast, in delayed hypersensitivity, saccules were not seen although there was marked enlargement of individual follicular units.
Flow alterations to give complete filling of the lymphatic sinusoidal system and saccular lymph spaces around the germinal centers were demonstrated during a primary immune reaction. By contrast, in delayed hypersensitivity, saccules were not seen although there was marked enlargement of individual follicular units.