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A novel method for precise detection of allergen-specific IgE via immobilizing His-tagged allergens to paper-based device To the Editor, Allergic diseases are characterized by elevated specific IgE (sIgE) serum levels against certain allergens.1,2 Thus, the fast and precise detection of sIgE is necessary for the diagnosis of allergic diseases. The features of this strategy for allergen immobilization were highlighted with strong and specific binding site, particularly the preservation of sIgE-binding activity without covering any IgE-binding epitopes of allergens (Figure 1B). [Extracted from the article]