Description: Patient education artwork for the article, "Seasonal Allergies: When Trees Make you Sneeze." The specific objectives of this image are to: (1) to show initial encounter between allergen (eg. pollen) and B cell, (2) illustrate the creation of IgE antibodies by plasma cell, (3) show IgE antibodies attaching to mast cell with IgE receptors, (4) show second encounter, when allergen encounters IgE-primed mast cell, it releases histamine and other chemicals causing symptoms. Lahey Clinic Health Magazine, Spring 2001


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