Eric Topol And Stephen R. Quake (2015) A Stethoscope for the Next 200 Years. The ability to see ‘alien’ DNA and RNA in the blood can detect cancers very early. The Wall Street Journal. Jan. 2, 2015 6:55 p.m. ET

“the amazing specificity of DNA and RNA sequencing has the potential to lead to much more informative, and better-performing tests—accurately determining what is going on in the body long before we would otherwise know—than the current set of imperfect and sometimes controversial tests”.