Allergy sufferers often react not only to a specific allergen, but also to “close relatives”. These are substances that are biologically or chemically very similar. For example, a pollen allergy sufferer can also react with swelling and itching in the throat when eating nuts (see food allergy). This is called a cross-allergy or cross-reaction. The ALL-KRA chip contains the oscillations, frequencies and information that are supposed to contribute to the alleviation/resistance of cross allergies.