Bellevue Hospital nurse Belkys Fortune (left) and Teressa Celia, associate director of infection prevention and control, during a demonstration of procedures for possible Ebola patients on Oct. 8. Richard Drew/AP hide caption

itoggle caption Richard Drew/AP

Thai surrogate mother Pattaramon Chanbua with her baby Gammy, who was born with Down Syndrome. An Australian couple who'd arranged for Pattaramon to serve as their surrogate rejected the child. Nicolas Asfouri/AFP/Getty Images hide caption

itoggle caption Nicolas Asfouri/AFP/Getty Images

A passenger wearing a face mask arrives at Los Angeles International Airport Friday. Federal officials now require people traveling from West Africa to enter the U.S. at one of five airports equipped to screen them for signs of Ebola. Mark Ralston /AFP/Getty Images hide caption

itoggle caption Mark Ralston /AFP/Getty Images

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