Researchers at the University of California, San Francisco have found a link between use of social media by pre-teens and future depression. The study, published this week in the American Medical Association’s journal JAMA, said more time spent on social media “may contribute to increased depressive symptoms over time.” Ali Rogin speaks with lead researcher Dr. Jason Nagata to learn more. PBS News is supported by - https://www.pbs.org/newshour/about/funders