Medical science is not focused on prevention of cancer because it is almost impossible to get research grants for it. Unlike a tumor to cut out, you can’t see prevention. It earns no fat fees, sells no drugs, confers no status, hones no surgical skills, plumps no resumes, buys no publicity, provides no immediate gratification at all. No researcher or agency can convincingly claim the credit for prevention. Few, therefore, are motivated to try.
— Michael Colgan, PhD. You Can Prevent Cancer, Apple Tree Publishing 2007.