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You're a germaphobe

We all know people who never leave the house without their hand sanitizer—you may even be that person. And yes, you should wash your hands with soap and water to kill germs that can make you sick.

But evidence also suggests that some germ exposure could steer the immune system away from allergies, and that an overly sterile environment might be bad. (It's called the hygiene hypothesis.) Good bacteria are also key for staying healthy, particularly for the skin, digestive tract, and vagina. So "fear of germs" does not equal "good health."

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