Grace Aber stands in the shade of a mango tree with her children in the remote village of Tumangu in northern Uganda. Four of Aber's nine children have been diagnosed with nodding syndrome, starting with Partick (front), who first showed symptoms in 2002. Matthew Kielty for NPR hide caption

itoggle caption Matthew Kielty for NPR

Jen Regan strokes the head of her fiancée, Marc Fucarile, as he sleeps in his hospital bed at Massachusetts General Hospital. Fucarile was injured in the bombings at the Boston Marathon, and had to have his right leg amputated. Bill Greene/Boston Globe via Getty Images hide caption

itoggle caption Bill Greene/Boston Globe via Getty Images

A typical Swedish meal of fried herring and lingonberries includes some of the local ingredients of the healthy Nordic diet prescribed in a new study. iStockPhoto.com hide caption

itoggle caption iStockPhoto.com

A construction worker paints walls at the Maryland Proton Treatment Center in Baltimore. Each of the center's five rooms will contain a massive piece of equipment that will rotate around a cancer patient to deliver a special kind of radiation. Jenny Gold/Kaiser Health News hide caption

itoggle caption Jenny Gold/Kaiser Health News

Patients wait in line at Nuestra Clinica Del Valle in San Juan, Texas, in September 2012 file photo. A study released on Wednesday finds that immigrants, particularly noncitizens, heavily subsidize Medicare, and that policies that restrict immigration may deplete Medicare's financial resources. Eric Gay/AP hide caption

itoggle caption Eric Gay/AP