A routinely prescribed asthma-controller medication may not work any better than placebo for more than half of all patients who use it.

Changes in gene activity in specific brain cells are associated with the severity of autism in children and young adults with the disorder.

Researchers have found a way to teach a computer to precisely detect one of the hallmarks of Alzheimer’s disease in human brain tissue.

The legalization of recreational marijuana is associated with an increase in its abuse, injury due to overdoses, and car accidents, but does not significantly change health care use overall.