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California Firm Reports Progress on Blood Tests to Detect Cancer

A California company says its experimental blood test was able to detect many types of cancer at an early stage and gave very few false alarms in a study that included people with and without the disease. Many companies are trying to develop early detection "liquid biopsy" tests that capture bits of DNA that cancer cells shed into blood. Grail's new results are from 2,300 people. The test detected 55% of known cancers and gave false alarms for 1%. It also accurately...

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