Using the immune system to fight cancer seems logical. If the immune system spots and attacks foreign invaders, then couldn’t those talents be harnessed to kill the trespasser that is cancer? Many scientists have puzzled about why the immune system doesn’t readily eradicate tumor cells and if it could be taught to do so. That question has led to the burgeoning field of immunotherapy, currently hailed as a great hope for treating cancer.
Progress in anti-cancer immunotherapy has been stilted, however. Fewer than 40 percent of patients treated with this approach achieve the kind of results that really make a difference to someone suffering from cancer: a longer life and less sickness.
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