Is there anyone infected by colorectal cancer?

Is there anyone who is infected by colorectal cancer? Although the root cause of cancer has not been fully understood, many scholars have conducted research and experimental observations and believe that colorectal cancer cells are not contagious, that is, colorectal cancer is not contagious and is not an infectious disease.

Someone once raised a healthy mouse together with a group of mice with cancer. After a long time, the healthy mouse was not found to be infected with cancer. The same is true for humans. In cancer hospitals, no cancer patients living in the same ward have been found to infect each other. Doctors, nurses, and care workers who have close contact with patients in hospitals have never been reported to have been infected with cancer.
In fact, someone has conducted a survey: the possibility of cancer among medical personnel and researchers engaged in tumor prevention and treatment is no higher than that of people in the same area. There are also couples who have lived together for a long time. After one of them got cancer, they still spend every day together and there is no phenomenon of infection between each other. As for the inoculation of cancer cells, in the laboratory, the same animal cancer specimens can be obtained by inoculating living cancer cells of the same animal into the same animal or athymic nude mice.