Why cancer is not a communicable disease?

Cancer is not a communicable disease because it is not caused by an infectious agent, such as a bacteria or virus. Cancer is a genetic disease that results from mutations in the DNA of cells. These mutations can occur spontaneously, or they can be caused by factors such as exposure to chemicals, radiation, or the sun.

Even though cancer is not caused by an infectious agent, it can spread from one person to another through the transmission of malignant cells. This can occur through the transfer of blood or bodily fluids, or through the transplantation of organs or tissues. However, even when cancer is transmitted from one person to another, it is not considered to be a communicable disease in the same way that infectious diseases are.

This is because the recipient of the malignant cells has not contracted, communicated, or transmitted an infectious agent, but rather that a malignant tumor and cells have been introduced by surgical implantation. This differs from the traditional meaning of transmission in relation to disease.