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Watch how the body’s ‘serial killers’ stalk and attack cancer cells
Washington Post

The body’s immune system is under constant assault — from viruses, bacteria and other foreign substances that threaten our health on a daily basis. How do we fight off that steady barrage of pathogens? With cells of our own that are, scientifically speaking, cold-blooded assassins.

A fascinating video published Tuesday by U.S. and British researchers in the journal Immunity shows in detail how cytotoxic T-cells, a specialized type of white blood cells, relentlessly hunt down and destroy cancer cells in the body.

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