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Allergy Reason

Big Picture Science

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The Hygiene Hypothesis and the Rise of Allergies

Medical anthropologist Theresa McPhail says that our overly antiseptic germicidal behavior may be one of the factors driving the rise in allergy cases. She explains some others and also gives a fuller account of the hygiene hypothesis, which has been partially discredited. Find out how diets and changes to the environment are giving our immune systems a workout.

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