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Whenever a germ or infection enters the body, the white blood cells snap to attention and race toward the "scene of the crime." The white blood cells are continually on the "lookout" for signs of disease. When a germ does appear, the white blood cells have a variety of ways by which they can attack. Some will produce protective antibodies that will overpower the germ. Others will surround and devour the bacteria.

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17y ago

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