Are advanced cancers such as lung cancer and kidney cancer contagious?

People's living standards have improved a lot now, and their daily diet is rich in nutrition. However, the incidence of kidney cancer has increased instead of decreased. We have found in clinic that the number of new cases of kidney cancer in the past five years has increased several times compared with 20 years ago. So are advanced cancers such as lung cancer and kidney cancer contagious?

What is certain so far is that cancer is not contagious. Please rest assured, patients and their families. Because the so-called contagion, in simple terms, is the transmission of a disease from one person to another through some means. Contagion must meet three conditions: the source of infection, the route of transmission, and the susceptible population. Clinical data prove that cancer patients themselves are not the source of infection.
Experts have conducted experiments in which cancerous tissues taken from cancer patients were directly implanted in another person and could not survive and grow. Although it is currently believed that the occurrence of certain cancers is related to certain viruses, such as cervical cancer, nasopharyngeal cancer, and leukemia, it has not yet been confirmed that infection with certain viruses will definitely lead to certain cancers.