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      Who needs to worry about West Nile virus

      |Summer is West Nile virus season, and cases of of the mosquito-borne disease have been reported in numerous states in recent weeks. For most people, infection is not serious, but some patients can get very sick or even die. Dr. Steven Gordon, chairman of the department of infectious disease at the Cleveland Clinic, tells CBS News who's most at risk and how to prevent it.

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