International Mast Cell Diseases Awareness Day, October 20

Mast cells, a type of blood cell, play an important role in the body’s immune system. They reside in all body tissues and form part of the body’s initial defense system. Mast cells react to foreign bodies and injury by releasing a variety of potent chemical mediators, such as histamine, when activated. In a healthy person these chemicals will act beneficially to protect...

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