Rebecca Davis
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When Jimmy Carter said his advanced melanoma was gone, he credited immunotherapy, treatments that harness the immune system to fight cancer cells. This idea dates back to a 19th-century doctor.
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She's a typical teen — blue nails, loves Coldplay. But she believes she won't be able to build a life in her homeland.
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Fatmeh is one of hundreds of thousands of children who have fled Syria with their families. In Lebanon, she works in the fields up to 14 hours a day, clinging to her dream of going to college.
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One of the most important medical advances may also be the simplest: hand-washing. It's the best defense against spreading disease. And its power was discovered long before anyone knew about germs.
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If you think that an artificial eye looks like a big glass marble, you're not alone. And you're wrong. We visit the people who made a prosthetic eye for a 5-year-old boy who lost an eye to cancer.