A federal whistleblower suit unsealed in late February alleges that Humana knew about billing fraud involving Medicare Advantage patients and didn't stop it. Ty Wright/Bloomberg via Getty Images hide caption

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The problem isn't just that fake cures are worthless, doctors say. Fraudulent claims also give some people the false sense that the product can protect them from getting sick. iStockphoto hide caption

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FDA Cracks Down On Fake Ebola Cures Sold Online

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