A cell goes through several steps to become a cancer cell. Each step can be caused by a different factor. However, there is one step that is universal to all cancer cells. The cell must flip to anerobic energy production. This is caused by infection of the mitocondria of the cell by the Rife BX BY organism which has been DNA sequenced and is a common organism, bacillus licheniformis. This must be removed to prevent cancer or recurrence of cancer. It is in the food chain. It is even in some probiotic supplements. So we are constantly getting reinfected with this organism. This is why Rife cured many cancers but most had metastatic cancer later. It is also why everyone will get cancer if they live long enough. The book, Tripping Over the Truth, does a good job explaining Nobel Laureate Warburg's analysis of this problem.
The Canadian Indians taught sailors how to cure scurvy with tea that had Vitamin C. It took 200 years before the head surgeon of the Royal Navy mandated limes be put on all ships. From that point forward the Limey's ruled the waves. It has been almost 100 years since Warburg figured out the root cause of cancer and it will take another 100 years before the right person wakes up.
Last night I was watching the TV series "Downton Abbey" and the lord of the manor jumped up and vomited blood all over the table during a formal dinner. It was diagnosed as an ulcer brought on by stress. 100 years later we were still saying ulcers were an emotional problem until an Australian physician drank a beaker of H. Pylori and then biopsied his stomach showing ulcer formation. He published and eventually got a Nobel prize for this. H. Pylori is a bad bug but scanners detect it easily today and frequencies make short work of it. Maybe some cancer physician needs to drink a beaker of bacillus licheniformis. Unfortunately it is much slower acting than H. Pylori.