Why Cancer is so difficult to cure
Clip: Season 1 | 1m 2s
Cancer cells are constantly mutating and become resistant to drugs
Aired: 03/29/15Video has closed captioning.
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Genentech, Cancer Treatment Centers of America, Siemens, David H. Koch, Bristol-Myers Squibb, the Alfred P. Sloan Foundation, Kovler Fund, The Arthur Vining Davis Foundations, the American Association for Cancer Research, the American Cancer Society, The Leukemia and Lymphoma Society, the Entertainment Industry Foundation, Stand Up To Cancer (SU2C)