First hand account, and experience are indeed considered to be a good source: English composition 101… IF you don't think so, then here is an irrefutable fact.
"...Parasitic Larvae Cause Cancer Reliable historic data shows that a cancer researcher initiated cancer in healthy laboratory animals by infecting them with parasitic larvae from a worm found in horses. This scientist "... proved that parasitic larvae can cause cancer, and that cancer starts with an infection of them..."
If you refer to http://www.nobelprizes.com/, (1926) you will discover that a Dr. Fibiger of Denmark initiated cancer in the laboratory in 1913. Mainstream medicine is fully aware of his discovery because Fibiger received the Nobel Prize in Medicine for this achievement. Why is this 80 year old cause of cancer research ignored and suppressed? Is there a cover-up in progress?