Grail's Galleri blood test, which is designed to detect cancer based on DNA analysis in the blood, failed to meet its primary goal in a large study conducted in England.[3] The test was able to detect only 40.4% of cancer cases, with about half of the positive results being false alarms – 38% of the positive tests were in patients without cancer.[3] Nevertheless, the test has demonstrated the ability to detect more than 50 types of cancer, and about three-quarters of the cancers detected are types for which there are no current screening programs, such as pancreatic, liver, and head and neck cancers.[3] In previous studies, the positive predictive rate of the test was lower, ranging between 43% and 50%.[3] The test has a very low false positive rate – only 0.4% – and can pinpoint where the cancer is in the body with 89% accuracy.[1][2]