Clinicians and first responders who care for victims of gun violence can suffer what's called vicarious trauma. Image Source/Getty Images hide caption

Insomnia, by Marina Benjamin NPR hide caption

Helping a spouse or parent who has dementia steer clear of hazards can include ridding the home of all guns. Nicole Xu for NPR hide caption

Nicole and Ben Veum, with their little boy, Adrian. Nicole was in recovery from opioid addiction when she gave birth to Adrian, and she worried the fentanyl in her epidural would lead to relapse, but it didn't. Adam Grossberg/KQED hide caption

Mourners comfort each other Thursday during a vigil at the Thousand Oaks Civic Arts Plaza for the victims of the mass shooting at Borderline Bar and Grill in Thousand Oaks, Calif. Kevork Djansezian/Getty Images hide caption

Researchers followed a group of kids from childhood into adulthood to track the link between trauma in early life and adult mental health. fzant/Getty Images hide caption

Join us for a webcast on life and health in rural America. From The Forum at Harvard T.H. Chan School of Public Health. Courtesy of Harvard T.H. Chan School of Public Health hide caption

Sister Bertha Lopez Chaves applies anti-inflammatory eyedrops to a migrant at a stadium in Mexico City where the caravan is resting. Her order is one of roughly 50 groups giving aid to the migrants in the Mexican capital. "We're just trying to deal with their basic needs so they can continue on," she says. James Fredrick for NPR hide caption

Patients awaiting epilepsy surgery agreed to keep a running log of their mood while researchers used tiny wires to monitor electrical activity in their brains. The combination revealed a circuit for sadness. Stuart Kinlough/Ikon Images/Getty Images hide caption

Researchers say it's too soon to say if marijuana could help humans with Alzheimer's, but experiments in mice showed some effects. MmeEmil/Getty Images hide caption

Tetris and other absorbing brain games can get you into a "flow" state that relieves stress. Mary Mathis/NPR hide caption

Food and Drug Administration Commissioner Scott Gottlieb, testifying before a House subcommittee in May. There are "very tight restrictions" being placed on the distribution and use of Dsuvia, Gottlieb said Friday in addressing the FDA's approval of the new opioid. But critics of the FDA decision say the drug is unnecessary. Chip Somodevilla/Getty Images hide caption

Getting people of different ethnicities and cultural backgrounds into clinical trials is not only a question of equity, doctors say. It's also a scientific imperative to make sure candidate drugs work and are safe in a broad cross-section of people. Richard Bailey/Getty Images hide caption

Even a week without marijuana use improves young people's ability to learn and remember. BURGER/Canopy/Getty Images hide caption

Social worker Lauren Rainbow (right) meets a man illegally camped in the woods in Snohomish County. A new program in the county helps people with addiction, instead of arresting them. Leah Nash for Finding Fixes podcast hide caption

Jonny Sun emerges from behind his social character and navigates his space within the illustration world. Christopher Sun /Courtesy of Kovert Creative hide caption

A drug specialist in the Mexican army shows crystal methamphetamine paste seized at a clandestine laboratory in Mexico's Baja California in August. Much of the meth sold in the U.S. today comes from Mexico, according to DEA officials. GUILLERMO ARIAS/AFP/Getty Images hide caption

The cerebellum, a brain structure humans share with fish and lizards, appears to control the quality of many functions in the brain, according to a team of researchers. Science Source hide caption

Among at least some rural Americans, pragmatism may now be superseding traditional disdain for government and the prizing of rugged individualism. Angela Hsieh/NPR hide caption

Paramedic Larrecsa Cox (center) and her quick-response team, including police Officer Stephanie Coffey (left) and Pastor Virgil Johnson (right), check in at the home in Huntington, W.Va., of someone who was revived a few days before from an overdose. Sarah McCammon/NPR hide caption