Study: Blood test can ID cancers without clear symptoms

(NewsNation) — A simple blood test can help screen for cancers, in most cases detecting the disease before any clear symptoms develop, according to a new study.The results of the Pathfinder study from health care company GRAIL show the possibilities of what's called multi-cancer early detection screening, which finds cancers in early stages."The PATHFINDER study is an exciting first step towards fundamental change in the approach to cancer screening. The study demonstrated the feasibility