There are as many causes of cancers as there are cancers. Suffice to say, a strong healthy body can resist cancer. It is quite debatable whether there is a direct pathogen involved, if it were as simple as "killing a bug to prevent cancer", I'm sure that Science would have long tackled the problem. The main problem with cancers is that there is no one clear cut cause, but a multitude of causes.
I have no doubt that eating too much red meat is implicated, and so are deficiencies of Vitamin D and Iodine. But so is alcohol and tobacco, too many chemicals/pesticides and heavy metals to mention.
An interesting point is that some cancer experts now believe that weak adrenals can increase cancer susceptibility and it makes perfectly good sense. If it were only that easy, take some Sod. Bicard. and your cancer is gone.
Once people begin to realize that all the Science & drugs in the world ain't gonna "cure" cancer, they may want to try living a more natural, drug-free life. It's a good start.