Floating colorful cubes in a vibrant space scene
0.01 mg/$

Description

Allergies occur when the immune system mistakes a normally harmless substance, called an allergen, for a harmful one. When the immune system detects an allergen, it triggers an immune reaction in an attempt to protect the body. In the case of cat allergy, the immune system reacts to certain proteins found in cats’ saliva, skin cells (also called “dander”), or urine.

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