https://blogs.scientificamerican.com/observations/colorectal-cancer-is-on-the-rise-in-young-adults/

Early detection is critically important to curing cancer. Although lowering the recommended age for colorectal cancer screening is a step in the right direction, it is unlikely to be enough to dramatically reduce colorectal cancer mortality. To increase early cancer detection, we need to improve compliance, and to improve compliance, screening needs to be convenient and affordable. A blood test that can be done without preparation during a routine clinic visit would go a long way towards achieving this goal.