New research suggests people tend to be lonelier in young adulthood and late life. But experts say it doesn’t have to be that way.

Recent studies cast doubt on whether large-scale mental health interventions are making young people better. Some even suggest they can have a negative effect.

New research finds that the death rate among Black youths soared by 37 percent, and among Native American youths by 22 percent, between 2014 and 2020, compared with less than 5 percent for white youths.

A genetic analysis sheds light on when the outbreak began, how the virus spread and where it may be going.

Thousands of Americans believe they experienced rare but serious side effects. But confirming a link is a difficult task.

All vaccines have at least occasional side effects. But people who say they were injured by Covid vaccines believe their cases have been ignored.