Blood tests for dozens of types of cancer have been invented. These tests, known as liquid biopsies, could save tens of millions of lives. That’s because there’s currently no good screening procedures for many types of cancers, such as pancreatic cancer and lung cancer. And by the time the tumors cause symptoms, it’s usually too late to save the patients’ lives. Also noteworthy is that these diagnostics, or multi-cancer early detection tests (MCEDs), can save hospitals and health insurers a great deal of mo ...