The US Food and Drug Administration has approved a blood test to be used for colorectal cancer screening among average-risk adults 45 and older. The maker of the test, Palo Alto, California-based biotechnology company Guardant Health, announced Monday that this is the first blood test to be approved by the FDA as a primary screening option for colorectal cancer, and it’s the first approved blood screening test for colorectal cancer that meets requirements for Medicare reimbursement. For...