One question usually strike in each individual mind, Guess what? Why doesn’t the body itself destroy cancerous cells? Okay, so let’s have an answer of this question.
The system targets and strikes microbes and foreign substances within the human body, and, yes, this could embody cancer cells. Still there are some cancer cells that belong from the same native cells but got altered. These are those cells that do belong in the body and these changed cells are sometimes not recognized by the immune system. That’s the reason, why our body, on its own is not able to kill the cancer cells.
The other reason behind not killing these cells by the immune system is also because of rapid multiplying the cancer cells (cancerous cells multiply very fast and our body is not fit to stop this speedy rising).