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Everyone presumes that soap is clean, but manufacturers know it's always got a few random germs in it. Most of the time that's not a problem, but every now and then things can get out of control.
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Around the world, patients acquire new infections simply from spending time in a hospital. One way to fight back: replacing hospital bed rails with copper, a natural infection-killer.
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The antibiotic-resistant bacteria C. difficile can be deadly. Fecal transplants often can cure infections but have a major ick factor. Capsules of fecal matter deliver the cure more politely.