Pick Your Battles
How Immune System Tells Bacterial Friend from Foe
By Anette Breindl
Monday, April 23, 2012
The immune system's raison d'être is to protect us from invading microbes. But in the intestines, at least, its chances of encountering bad bugs, which necessitate a vigorous response, are, if not exactly as rare as a lightning strike, then nevertheless the exception rather than the rule.
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