Shots - Health News NPR's online health program.

Greg O'Brien gathers his thoughts before a run in 2013. "Running is essential," he says. Michael Strong/Living With Alzheimers hide caption

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Michael Strong/Living With Alzheimers

One Man's Race To Outrun Alzheimer's

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From Naked Mole Rats To Dog Testicles: A Writer Explores The Longevity Quest

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Closing loopholes in background checks for gun purchases would reduce the risk of death and injury, doctors' and attorneys' groups say. Alexa Miller/Getty Images hide caption

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Alexa Miller/Getty Images

Shopping for an MRI scan? Guroo.org, won't yet show you what your local hospital or radiologist charges, but it will reveal the average cost of the test in your area. iStockphoto hide caption

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An overgrowth of Clostridium difficile bacteria can inflame the colon with a life-threatening infection. Dr. David Phillips/Getty Images/Visuals Unlimited hide caption

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Dr. David Phillips/Getty Images/Visuals Unlimited

Who, me? The Asian relative of this domestic gerbil is a well-known host to the bacteria that cause plague. Valentina Storti/Flickr hide caption

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Valentina Storti/Flickr

Gerbils Likely Pushed Plague To Europe in Middle Ages

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