SUNDAY, May 22 (HealthDay News) -- Young athletes who return to play before a concussion fully heals and sustain another head injury can suffer serious and potentially deadly brain complications, an expert warns.

SUNDAY, May 22 (HealthDay News) -- The severity of cystic fibrosis, a life-threatening hereditary condition that affects the lungs and digestive system, seems to be influenced by genetic variations, researchers have found.

SUNDAY, May 22 (HealthDay News) -- New Swedish research suggests that the drug Inspra reduces the threat of major cardiovascular complications among patients who have a mild form of heart failure.