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An _____ is any foreign substance that, when introduced into the body, activates the immune system.

Divya.

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7 years ago

An _____ is any foreign substance that, when introduced into the body, activates the immune system.

An _____ is any foreign substance that, when introduced into the body, activates the immune system.

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EDUdicament

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Divya. Author

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Thanks

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MAry1395

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Just got PERFECT on my quiz

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