Edna and Her Angry Little Mast Cells

Edna has a body. Her body has many cells, around 37 trillion of them. She is the Boss of her body, but her cells have a Mind of their Own! And sometimes her cells behave as if they're the Boss!Join Edna on her journey of discovery, as her mast cells react, and sometimes overreact, to allergens. And as she learns, so do you, how to recognize and treat this common ailment.