There is no longer any doubt that physicians can tap the immune system to beat such cancers as melanoma, lung cancer and aggressive forms of leukemia, as journalist Karen Weintraub reports in the April issue of Scientific American. Researchers are finally beginning to understand which parts of the immune system to tweak in order to cure at least some people. Some of these approaches are depicted in the following video. 

This video was reproduced with permission and was first published on September 15, 2015. It is a Nature Video production.