Andrew Witty, CEO of GlaxoSmithKline, says that better control of infectious diseases in Africa is allowing chronic diseases to come to the surface. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP

Soldiers participate in physical therapy while using a prosthetic brace called the Intrepid Dynamic Exoskeletal Orthosis (IDEO), which allows them to use and strengthen severely injured legs. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images

Maygan Rollins, a field organizer with Enroll America, talked health insurance options with Jerry Correa during a recent campaign in Miami. Lynne Sladky/AP hide caption

itoggle caption Lynne Sladky/AP

Mary-Claire King says obscurity gave her the freedom to spend years looking for breast cancer genes. Mary Levin/University of Washington hide caption

itoggle caption Mary Levin/University of Washington

Eight-year-old Manish, who caught polio years ago, learns to walk with leg braces at a rehabilitation center in New Delhi on Thursday. Manish Swarup/AP hide caption

itoggle caption Manish Swarup/AP

Researchers say intervention in early childhood may help the developing brain compensate by rewiring to work around the trouble spots. iStockphoto hide caption

itoggle caption iStockphoto

The fatality rate in an Ebola outbreak ranges from 25 percent to 90 percent, depending on the particular strain of the virus involved. Cynthia Goldsmith/ Centers for Disease Control and Prevention hide caption

itoggle caption Cynthia Goldsmith/ Centers for Disease Control and Prevention

Some employees say e-cigarettes increase their productivity and help them steer clear of tobacco. But health regulators are looking into possible risks to e-cig users — and to co-workers. iStockphoto hide caption

itoggle caption iStockphoto

A makeshift latrine hangs over the water at the edge of Cite de Dieu, a slum in Port-au-Prince, Haiti. John W. Poole / NPR hide caption

itoggle caption John W. Poole / NPR

Your schnoz deserves more respect. epSos .de/Flickr hide caption

itoggle caption epSos .de/Flickr