The term cancer vaccine refers to a vaccine that either prevents infections with cancer-causing viruses, or treats existing cancer.Some cancers, such as cervical cancer and some liver cancers, are caused by viruses, and traditional vaccines against those viruses, such as HPV vaccine and Hepatitis B vaccine, will prevent those cancers.Some researchers believe that cancer cells routinely arise and are destroyed by the healthy immune system. cancer forms when the immune system fails to destroy them. They are separating proteins from cancer cells and immunizing cancer patients against those proteins, in the hope of stimulating an immune reaction that would kill the cancer cells. Therapeutic cancer vaccines are being developed for the treatment of breast, lung, colon, skin, kidney, prostate, and other cancers.
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