Life's not easy for a workaday cell, and amid all the hustle and bustle it takes to keep the human body going, it can be hard to know who's an enemy and who's a friend. You might think all germs are bad, but it turns out some bacteria aren't just friendly, they're downright essential (not to mention cuddly ) In fact, when an old nemesis returns, it might just be those friendly, cuddly bacteria that help save the day. The saga of life inside you continues
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