By MICHAEL SMITH

In what researchers are calling a first, a vaccine that targets skin cancer cells shrinks tumors and cuts the chance that the disease will return.

In a large clinical trial, more than twice as many people who got the vaccine saw their tumors shrink compared to those who didn't get the drug, Dr. Douglas Schwartzentruber of Indiana University told colleagues at the annual meeting of the American Society of Clinical Oncology.

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