This Blood Test Targets 50 Types of Cancer

Bleak statistics accompany the world’s leading cause of death: 1 in 2 of us will be diagnosed with cancer in our lifetime. Earlier diagnosis drastically improves survival, but unfortunately unscreened cancers account for 80 to 90 percent of cancer deaths, says Harpal Kumar, president of the European wing of Grail, a health care company whose mission is to detect cancer earlier.

Of the more than 200 types of cancer, we currently only screen for cervical, breast, and bowel cancer, says Kumar. He calls this the streetlight problem: “We’re looking for cancer in the light, but four-fifths are happening in the dark.” But

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