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Published on Jul 21, 2011
More in the "Immune System 101" playlist: http://www.youtube.com/playlist?list=... Dr. Homer Boushey explores the hygiene hypothesis, the notion that modern cleanliness causes a lack of stimulation of the immune system in early development, making children more vulnerable to things that cause asthma. Series: "UCSF Osher Mini Medical School for the Public" [7/2011] [Health and Medicine] [Show ID: 21377]