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Crushing Cancer’s Defenses

Vaccine approval offers hope while other armies muster

11:10am, April 22, 2011

Twirling globs of white blood cells circle a tumor like a Greek army ready to lay siege. These cells are used to winning — they take down baddies such as viruses and bacteria on a daily basis. But cancer cells are not an ordinary enemy. Like Troy, they set up hefty barricades against attack, often killing white blood cells or turning them off on the spot. Too often, the immune system loses this Trojan War.

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