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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

Can you name the 10 emotions conveyed above? The first six are basic emotions. The last four are complex emotions that combine two of the basic ones. (Check at the bottom for the answers.) Courtesy of Aleix M. Martinez hide caption

itoggle caption Courtesy of Aleix M. Martinez

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

When Brad Stevens was young, his only "health insurance" was taking tons of vitamins and spending three hours at the gym every day. But after a serious bike accident and an expensive battle with thyroid cancer, the 59-year-old realized nobody's invincible. Heidi de Marco/Kaiser Health News hide caption

itoggle caption Heidi de Marco/Kaiser Health News

A boy waits to get vaccinated at an anti-polio campaign in Moradabad, India. Michaeleen Doucleff/NPR hide caption

itoggle caption Michaeleen Doucleff/NPR

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

The research team used yeast chromosome No. 3 as the model for their biochemical stitchery. Pins and white diamonds in the illustration represent "designer changes" not found in the usual No. 3; yellow stretches represent deletions. Lucy Reading-Ikkanda hide caption

itoggle caption Lucy Reading-Ikkanda

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