Several states distribute Naloxone hydrochloride, also called Narcan, to treat opium-based drug overdoses. But only one company manufactures the drug, and the price has spiked in recent years. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP

Instructions for the colon screening test were devised so they can be understood in any language. Courtesy of Kaiser Permanente Center for Health Research hide caption

itoggle caption Courtesy of Kaiser Permanente Center for Health Research

Up till now, all babies have had two genetic parents. That could soon change. Klöpper & Eisenschmidt GbR/iStockphoto hide caption

itoggle caption Klöpper & Eisenschmidt GbR/iStockphoto

Carl Moore, a former helicopter mechanic, was diagnosed with ALS 20 years ago. He has had unusual longevity for someone with ALS but expects someday to rely on his wheelchair and speech-generating device. Justin Steyer/KPLU hide caption

itoggle caption Justin Steyer/KPLU

Joscelyn Benninghoff, 10, goes over the results of her cholesterol test with her mother Elizabeth Duruz (right) and Dr. Elaine Urbina at Cincinnati Children's Hospital in 2011. Al Behrman/AP hide caption

itoggle caption Al Behrman/AP