Groundbreaking blood test could detect over 20 types of cancer

Modern medical innovations have given doctors the power to screen for a variety of cancers, and that's great, but screening for multiple types of cancers at the same time, and with a single test, is essentially still a pipe dream. However, that may be about to change thanks to a new kind of blood test that researchers say is showing serious promise. The test, developed by a company called GRAIL, may be able to accurately detect over 20 different types of cancer by hunting for their unique signat...