Dr. Neil K. Mehta of The University of Texas Medical Branch is a guest editor of “Why Does Health in the U.S. Continue to Lag Behind,” a special supplemental issue of The Journals of Gerontology, Series B: Psychological Sciences and Social Sciences. “There’s no simple answer,” Mehta said. “The issue touches on the many complicated factors with a focus on social and behavioral factors. The U.S. has lagged behind for some time, but over the last decade, it’s gotten a lot worse. Even though the U.S. has fared poorly compared to other countries, we are falling even further behind.”