Researchers report progress in cancer immunotherapy

They say they boosted the effectiveness in melanoma patients by carefully selecting and cloning T cells from patients' blood.In a bid to make cancer immunotherapy more effective, researchers report they have succeeded in halting the progress of aggressive melanoma in its tracks — at least briefly — in seven patients treated with an army of cloned cancer-fighting immune cells. In one of those patients, the treatment resulted in complete remission of his metastatic melanoma and evidence that his immune system stands ready to fight any return of the cancer after three years.

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