Emerging tests promise to screen for many cancers at once, but one just failed in a big trial. Will these diagnostics deliver on their promise someday?

Slow-healing lesions — common in diabetics and burn victims — can lead to lingering infections that resist antibiotic treatment. A new approach using light-activated therapies may offer a solution.

Researchers have uncovered a previously underappreciated mechanism involved in Alzheimer’s disease and developed a compound that interrupts it. For decades, Alzheimer’s research has largely focused on amyloid plaques and tau tangles, the protein abnormalities that accumulate in the brain as the disease progresses. Yet despite billions of dollars in research and numerous drug development efforts, [...]