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Bacteria is useful in making many medicines.

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To maintain balance in environment.

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15y ago
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12y ago

Some bacteria help you digest your food, some some make vitamins that your body needs.

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12y ago

Bacteria as a normal micro flora in or on the human body helps to improve the body's immune system and prevent attack by other microbes.

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Q: What is the role of bacteria in the human body?
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