Radiation therapy is effective in treating breast cancer but typically requires dozens of visits over five to seven weeks. A newer protocol takes just three weeks. Antonia Reeve/Science Source hide caption

itoggle caption Antonia Reeve/Science Source

Bob Smithson, 79, can now hold his head upright and breathe on his own, thanks to a medication for myasthenia gravis. M. Scott Brauer for NPR hide caption

itoggle caption M. Scott Brauer for NPR

Life online is all about sharing images. Being able to share medical images would make health care a lot easier, patients say. Science Photo Library/Corbis hide caption

itoggle caption Science Photo Library/Corbis

Dr. Allan Ropper speaks with residents and fellows as they do rounds at the neuroscience intensive care unit at Brigham and Women's Hospital in Boston. M. Scott Brauer for NPR hide caption

itoggle caption M. Scott Brauer for NPR

An Indian woman takes tuberculosis pills at a clinic in Mumbai. More than 700 Indians die from TB each day. That's one death every two minutes. Pal Pillai/AFP/Getty Images hide caption

itoggle caption Pal Pillai/AFP/Getty Images