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Human bodies contain bacteria that are representing between 1-3% of the body mass and their role is to maintain us healthy. Each bacteria have a role within the area where it resides and they are everywhere in the gut, skin, stomach, conjunctiva etc. Both bacteria make-up and their abundance varies from one human body to another. Although we are just getting to understand their wider role in our health, it is obvious that research makes progress to understand the types and varieties as well as roles and how can we control properly their proportion within each human body.
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