Katie Clapp shares a laugh with her son Andy Tranfaglia, 25, at their home in West Newbury, Mass. Andy has a rare genetic condition called fragile X syndrome. Ellen Webber for NPR hide caption

itoggle caption Ellen Webber for NPR

Health workers rest outside a quarantine zone at a Red Cross facility in the town of Koidu, Kono district in Eastern Sierra Leone on Friday. The World Health Organization says the number of Ebola deaths in the current outbreak has exceeded 7,000. Baz Ratner/Reuters/Landov hide caption

itoggle caption Baz Ratner/Reuters/Landov

Lactobacillus acidophilus, which is one variety of the genus Lactobacillus is one of the common active cultures found in yogurt and in the human gut. Scimat Scimat/Getty Images/Photo Researchers hide caption

itoggle caption Scimat Scimat/Getty Images/Photo Researchers

Keith Herie is swamped in debt from medical issues he and his wife encountered starting about a decade ago. Heartland hospital is seizing 10 percent of his paycheck and 25 percent of his wife's wages, and has placed a lien on their home. Steve Hebert for ProPublica hide caption

itoggle caption Steve Hebert for ProPublica