Refugees fill cans with water inside a camp in Baalbek, Lebanon, for Syrians who have fled the fighting in their country. Spencer Platt/Getty Images hide caption
Health workers vaccinate a boy against polio at a May immunization drive in Mogadishu, Somalia. Farah Abdi Warsameh/AP hide caption
Colds can easily turn into sinus infections in children. iStockphoto.com hide caption
Soda bottles and household chemicals are sometimes used to make low-power bombs. iStockphoto.com hide caption
A 13-year-old girl gets an HPV vaccination from Judith Schaechter, a pediatrician at the University of Miami, in 2011. Joe Raedle/Getty Images hide caption
Dylan Murphy, 3, plays with a swan at the Please Touch Museum in Philadelphia. It was his first trip to a museum that didn't overwhelm him. Courtesy of Noelle Murphy hide caption
The newest version of the Robohand is made of snap-together parts, reducing the amount of hardware needed. Courtesy of Jen Owen of Jen Martin Studios hide caption
Instructional assistant Jessica Reeder touches her nose to get Jacob Day, 3, who has autism, to focus his attention on her during a therapy session in April 2007. Rich Pedroncelli/AP hide caption
Beheading Barbie is the kind of aggression that can cause sibling distress. iStockphoto.com hide caption
Marc Silver and his daughter Maya wrote a book about how teens deal with a parent sick with cancer. Richard Nowitz/Courtesy of Marc Silver hide caption
Use of CT scans has doubled for children under five and tripled for older children. iStockphoto.com hide caption
Katherine Cuntz and Sarah Gaudet go up to head the ball during a Louisiana high school championship game in 2011. Gerald Herbert/AP hide caption
Barton Holmes, 2, sits with his father, Kevin Holmes, and his mother, Catherine McEaddy Holmes, during an appointment at Children's National Medical Center in Washington, D.C. Maggie Starbard/NPR hide caption
Sarah Murnaghan, center, on May 30 as she and her parents marked the 100th day of her stay in Children's Hospital of Philadelphia. Her father, Fran, is at left. Her mother, Janet, is at right. Murnaghan family/AP hide caption
More than 200 people have Walking Gallery jackets that tell the story of their experiences with health and the medical system. Maggie Starbard/NPR hide caption