Grail shares plunged nearly 50% in premarket trading on Friday after its three-year cancer screening trial failed to meet its main goal, dealing a major blow to the blood test maker.

During an investigation into a data breach at Clinical Diagnostics, a total of 118 victims have filed reports with the Dutch Public Prosecution Service.

Why is a horse’s veterinary history so key to understanding the risk of fatal injury on the racetrack? Epidemiologist Dr. Tim Parkin offered a fascinating look at one answer to that question during ...