Contact: Michael C. Purdy
Washington University School of Medicine
Caption: Pictured is a helminth parasite. When such a parasite infects mice, some of the signals that the animal's immune system produces to defend against it can activate a latent viral infection.
Credit: D. Davesne/Wikipedia
Usage Restrictions: Taken from Wikipedia. For
CC BY-SA 3.0 license, go to image.
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