Opinion: Dear NHS: You need a control arm for Grail’s cancer test
A simple blood test able to detect 50 different cancers is the grail of cancer screening. And Grail — the aptly named startup that makes the test — has persuaded the United Kingdom’s National Health Service to pilot test it in 140,000 symptom-free Britons.
But the pilot is missing a control group: 140,000 similar individuals who don’t get the Grail test.
Read Original Article: Opinion: Dear NHS: You need a control arm for Grail’s cancer test »
