A better blood test? New screening methods might be able to read DNA and RNA for information about a person's health. ISTOCKPHOTO/PMISAK Free-floating messages in the bloodstream could soon provide a unique window into the body. Researchers worldwide are racing to decipher circulating genetic material for better ways to diagnose disease, monitor pregnancy, and even improve food safety. Circulating DNA and RNA—temporary gene copies that act as blueprints for protein production—was first discovered in 1948. Researchers still do not fully understand how the free-floating genetic...
photo: Public Domain / Mattes
