A closely watched clinical trial in Britain that screened blood for early detection of cancer did not show a reduction in diagnoses at later stages of the disease.

Grail’s shares plummeted more than 45% after-hours Thursday as the medtech revealed a major National Health Service (NHS) ...

Despite efforts by test maker Grail to highlight outcomes the company considers positive, some experts are warning against using the Galleri test and others like it.

HealthDay News — A blood test designed to find cancer early did not work as hoped in a major new study, according to the company that makes it. The test, called Galleri, failed to lower the number of ...