
	3D Medical Animations Close This information is provided by an independent source. Merck & Co. does not endorse and is not responsible for the accuracy of the content, or for the practices or standards of non-Merck sources. This information provided is not intended to be a substitute for professional medical advice. A licensed healthcare professional should be consulted for diagnosis and treatment of any and all medical conditions. The manufacturer of a product generally has the most complete information about that product. How to use How to use The world's largest library of 3D medical animations developed and copyrighted by Blausen Medical Communications. The Human Atlas figures rotating model, labeled slides, and printable text in addition to animated videos. Shows a video of the selected health topic. Controls play, pause, and restart of the video. Shows a summary of the selected health topic. Controls to scroll the text. Shows a 3 D model of the video. Controls to rotate the model. Shows slides from the video. Controls to change slides.

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This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.

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hay fever an atopic allergy characterized by sneezing, itching and watery eyes, nasal discharge, and a burning sensation of the palate and throat. It is a localized anaphylactic reaction to an extrinsic allergen, usually pollen or the spores of molds. When the allergen comes in contact with cell-bound immunoglobulin E in the tissues of the conjunctiva, nasal mucosa, and bronchial tree, the tissues release mediators of anaphylaxis and produce the characteristic symptoms of hay fever.

nonseasonal hay fever , perennial hay fever nonseasonal allergic rhinitis.

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