How UnitedHealth turned a questionable artery-screening program into a gold mine

The nation's largest health care company pressed thousands of its clinicians to use a thinly tested medical device to screen people for artery disease, dramatically boosting payments from the federal government for years even though many of the patients were not sick, a STAT investigation found. Read more.

By Casey Ross, Lizzy Lawrence, Bob Herman, and Tara Bannow

Ryan Christopher Jones/Courtesy Luke Rosen

A bespoke genetic therapy is helping Susannah. Can similar drugs be made at scale for other rare diseases?

Custom gene therapy treatments transformed Susannah's life at eight years old, reversing some of the effects of her rare neurodegenerative disease. Her case adds to growing evidence that it's scientifically feasible to develop treatments for diseases so rare that they've historically gone undiagnosed and ignored.

By Jonathan Wosen

Jim Watson/AFP via Getty Images

Trump keeps losing his train of thought. Cognitive experts have theories about why

While none said they could give a diagnosis without an examination, experts on memory, cognition, and linguistics said certain shifts in Trump's speaking style are potential indications of cognitive decline. Read more.

By Olivia Goldhill