An allergic reaction occurs when the body’s immune system overreacts to an allergen.A food allergy is an immune-mediated adverse reaction to a particular food. For someone with a food allergy, eating or swallowing even a tiny amount of a particular food can cause symptoms such as skin rash, nausea, vomiting, cramping, and diarrhea. Reaction is often called a hypersensitivity reaction. Rarely, a severe allergic reaction can cause a…

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