Take a look at this article from the Associated Press:
So now who cares if radiation gives you cancer? All you have to do is go to the nurse's office and get a shot!
From the article:Now, doctors have overcome 30 years of false starts and found success with a way to fight cancer: using the body's natural defender, the immune system.
The approach is called a cancer vaccine, although it treats the disease rather than prevents it.
Experimental vaccines against four cancers — lymphoma, prostate, melanoma, and an often fatal childhood tumor called neuroblastoma — gave positive results in late-stage testing in recent weeks, after decades of struggles in the lab.
[P.S. It's still a loooonng way from being perfected.]