The reason cancer is so hard to battle is that it is an evolutionary process that brings it about. Cancer is a kind of accelerated evolutionary process. When cancer happens, it is in fact the effect of a cell of the body suddenly deciding to just evolve on its own, trying all kinds of new mutant genetic combinations. The cell rapidly multiplies, trying out all kinds of new stuff, going over in a few months, what it would take thousands of years for natural selection and evolution to achieve. When you try to fix the problem with a drug, it doesn't kill all of your cancer cells. You have all kinds of cells with varying genetic makeup. Some of them will be resistant to the drug and some of them won't. What happens when you start out on a new drug is, it kills off all the mutant cells that are unable to resist the drug. You usually feel better and believe the drug is working. The cells that have the genetic makeup to resist the drug take a few days to regroup and come back with a vengeance. This is why the best that cancer drugs often do is to allow patients to live a bit longer. They just buy you a little time.
The new alternative cancer treatment
They call immunotherapy cancer treatment a kind of cancer vaccine. The doctor takes a sampling of your immune cells and trains them, much like you would train a dog to go after a particular scent, to attack your cancer cells. He then puts those trained in cells back into your body. And then he says "Go get 'em, boy!". They multiply and successfully wipe the cancer out. At least that's what happens in theory. In practice, it doesn't work that well. But it's a promising new hope for the future.
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