| http://www.w3.org/ns/prov#value | - ???If you are exposed to microbes, especially early in life, you stimulate the immune system in various ways and it becomes tolerant,??? says study author Dr. Bill Hesselmar of Queen Silvia Children???s Hospital in Gothenburg, Sweden. ???We thought [hand washing dishes] might be important, but we didn???t know, so we asked that question.???
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