What is the root cause of all cancers?

There is no single root cause of all cancers. Cancer is a complex disease that can be caused by a variety of factors, including:

* Genetic mutations: These are changes in the DNA that control the growth and division of cells. Some genetic mutations can be inherited, while others occur spontaneously.

* Environmental factors: These include exposure to harmful substances such as tobacco smoke, asbestos, and radiation.

* Infections: Some infections, such as human papillomavirus (HPV) and hepatitis B virus (HBV), can increase the risk of developing certain types of cancer.

* Immune system disorders: People with weakened immune systems are more likely to develop cancer.

* Age: The risk of developing cancer increases with age.

It is important to note that most cancers are not caused by a single factor. Rather, they are the result of a combination of factors.