Viaskin Peanut is an epicutaneously delivered immunotherapy in development for the treatment of peanut allergy. The Viaskin patch contains antigen in dry form, which adheres to a central backing surrounded by an adhesive crown that secures the patch to the skin, creating an occlusive chamber. The patch is applied once daily. The Viaskin patch works by gradually exposing the patient to an allergen. After the patch is applied, the allergen is concentrated in the superficial layers of the skin, where it activates the immune system.

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