Vaccine Shows Promise vs. Melanoma in Small Study

Vaccine Shows Promise vs. Melanoma in Small Study
Francisco Kjolseth/The Salt Lake Tribune via AP

A personalized "cancer vaccine" may help keep a deadly form of skin cancer from growing for years, a small new study in humans suggests.

Unlike vaccines that prevent infections, such as measles and influenza, cancer vaccines are a form of immunotherapy that take down cancer cells that already exist. The vaccines train immune cells, called T cells, to better recognize cancer and target it for destruction, while sparing healthy cells in the body. 

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