With the advent of technology and discoveries in medical science, the world’s mortality rate has declined. However, some diseases or ailments still have unknown causes or do not have a cure. Cancer is one such disease that has claimed many lives, and the chances of being completely cured are quite thin.

Amongst the disease that has plagued the Earth, a majority of them have been eradicated. And, this we owe to the discoveries in medical science. However, there are diseases that still haunt us, since no permanent cure has been found for the same. Cancer is one such disease that cannot be completely cured.