Many dominant T cell variants decline during pregnancy and reappear afterward, possibly explaining why relapses of the autoimmune disease are less common when women are expecting.

A Chicago-based center that has long operated a clinical trial program for stem cell therapies, has stopped recruiting further patients as its chief, Richard Burt, leaves for a research sabbatical.

Molecules produced by resident bacteria and their hosts may signal immune cells to attack the body’s own tissues.

On embracing technology and collaboration to tackle brain disorders like multiple sclerosis

A list of this year’s newsworthy successes—and failures—in drug development