A colon cancer breakthrough, a major deli meat recall and the link between dementia and wildfire smoke: Catch up on the week’s health news Yahoo LifeF.D.A. Approves Blood Test for Colon Cancer Detection The New York TimesFDA Approves Blood Test for Colon Cancer: What to Know About Colorectal Warning Signs CNETWill a new colon cancer blood test replace your colonoscopy? National GeographicBlood test for colon cancer screening is approved by US regulators The Associated Press