DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Running nose. Close-up of a mucus and pus discharge emerging from the nose of a young child. This discharge, also known as a mucopurulent discharge, is due to a chronic infection of the upper nasal tract. This condition is known as rhinitis and is seen in colds, influenza or allergies such as hay fever.
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