Researcher Svante Pääbo, was able to extract a complete genome from this ancient human leg bone. Bence Viola/Max Planck Institute for Evolutionary Anthropology hide caption

itoggle caption Bence Viola/Max Planck Institute for Evolutionary Anthropology

Dr. Denis Mukwege (left) listens as Britain's Foreign Secretary William Hague speaks after the two men were presented Georgetown University's annual Hillary Rodham Clinton Award for Advancing Women in Peace and Security, at Georgetown University in Washington, in February. Mike Theiler/Reuters/Landov hide caption

itoggle caption Mike Theiler/Reuters/Landov

Even versions of Zi Xiu Tang Bee Pollen labeled "genuine" and "anti-counterfeit" have been found to contain the drug sibutramine, which was supposed to come off the U.S. market in 2010 for safety reasons. Food and Drug Administration hide caption

itoggle caption Food and Drug Administration

This experimental Ebola vaccine, developed by the U.S. government, is just one of several undergoing small-scale, preliminary testing. University of Maryland School of Medicine/AP hide caption

itoggle caption University of Maryland School of Medicine/AP

Angie Gardea depends on her job at a hair salon to put food on the table. But because of the Ebola outbreak, business has been slow. Customers are afraid to come in. Michaeleen Doucleff/NPR hide caption

itoggle caption Michaeleen Doucleff/NPR

An official at the University of Michigan Health System in Ann Arbor says its mix of patients helps explain the infection rates. Scott C. Soderberg/Courtesy of University of Michigan Health System hide caption

itoggle caption Scott C. Soderberg/Courtesy of University of Michigan Health System

The Daulatdia brothel is the largest in Bangladesh, with more 2,000 prostitutes. Many arrived here after being kidnapped by gangs, sold by family members or lured with promises of good jobs. Lisa Wiltse/Corbis hide caption

itoggle caption Lisa Wiltse/Corbis

Thomas Nellon (left), 17, and his brother Johnson Nellon, 14, of Liberia smile at their mother in the arrivals area at John F. Kennedy International Airport in New York earlier this month. The brothers received a health screening upon arrival. The U.S. says it will step up screening measures for arrivals from Ebola-affected West African countries. Craig Ruttle/AP hide caption

itoggle caption Craig Ruttle/AP