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Farm living: effects on childhood asthma and allergy - Nature Reviews Immunology
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Hygiene hypothesis - Wikipedia
In medicine, the hygiene hypothesis states that early childhood exposure to particular microorganisms (such as the gut flora and helminth parasites) protects against allergies by properly tuning the immune system.[1][2] In particular, a lack of such exposure is thought to lead to poor immune tolerance.[1] The time period for exposure begins before birth and ends at school age.[3] While early versi
takehiko-i-hayashi 2013/08/01
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Farm living: effects on childhood asthma and allergy - Nature Reviews Immunology

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