The drugs work by unleashing the immune system to attack cancer cells, much as it attacks bacteria or other foreign invaders in the human body.
Promising New Cancer Drugs Empower the Body’s Own Defense System - NYTimes.com: " . . . . The drugs, still generally in early testing, work in an entirely new way, by unleashing the immune system to attack cancer cells much as it attacks bacteria. That could be an alternative to often-debilitating chemotherapy.
Finding ways to use the body’s own defenses has been a goal since the late 1800s, when a New York surgeon named William B. Coley noticed that cancer disappeared in a patient who had a severe bacterial infection. . . ."
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