After five years as a health expert on ``The Oprah Winfrey Show,'' Dr. Mehmet Oz gets an hour of his own each weekday to discuss viewers' health-and-wellness concerns. No subject is off limits, as Dr. Oz addresses viewers' questions and talks to health experts about any and all topics, from sex to diet and exercise to diseases and ways to avoid them.

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Dr. Oz's Power of Prevention Hour

A new strain of influenza; preventing heart attacks; food poisoning.

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