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    Tonsillitis is an infection or inflammation of the tonsils. The tonsils are balls of tissue on either side of your throat, above and behind your tongue. They are part of your immune system, which helps you fight infection.

    Current as of: November 20, 2015

    Author: Healthwise Staff

    Medical Review: Adam Husney, MD - Family Medicine & Charles M. Myer, III, MD - Otolaryngology

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