A tech startup said it could start a medical revolution with a little machine and a drop of blood. It was a fraud, but research into smarter, less invasive blood testing is a reality. Today’s show was produced by Will Reid and Miles Bryan, edited by Matt Collette, engineered by Efim Shapiro, fact-checked by Laura Bullard and hosted by Haleema Shah. Transcript at vox.com/todayexplained Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices