'Critics of MCEDs also warn that a deluge of test results could put additional pressure on already overstretched health services. A Galleri pilot screening programme in Arizona for firefighters missed many instances of cancer, raising questions about accuracy. Companies might be putting profits above patient welfare by selling the tests before they complete the randomised trials required to prove they work and can save lives, they say.'

https://www.ft.com/content/b5aaa6a9-a5a9-44a4-a57e-5ad69babcd7b