The National Institutes of Health has announced new guidelines for when parents should begin introducing peanut-containing foods into the diets of infants at risk for food allergies.
Andrew M. Halpern/Flickr
Emmie de Wit, who usually works in a Biosafety Level 4 Lab, spent time in less secure labs in Liberia during the Ebola outbreak in West Africa. Above, she prepares to test Ebola patient blood samples.
Courtesy of NIAID
Ronald Davis cares for his 31-year-old son, Whitney Dafoe. Dafoe is seriously ill with ME/CFS. His father, a Stanford University professor, is organizing a study of the disorder.
Courtesy of Ashley Davis
Neuroscientist Takashi Kitamura works in the lab of Nobel laureate Susumu Tonegawa at the Massachusetts Institute of Technology. One of their recent projects helped identify a brain circuit involved in processing the "where" and "when" of memory. "Ocean cells" (red) and "island cells" (blue) play key roles.
Nina Pham, 26, steps off a plane Thursday night at a municipal airport in Frederick, Md. An ambulance was waiting to take her to the National Institutes of Health in Bethesda, Md.
Paul J. Richards/AFP/Getty Images
Victoria Ruiz (left), a postdoctoral fellow in immunology, works with Brianna Delgado, a high school student that she mentors, at the Blaser Lab, inside NYU's Langone Medical Center in New York, NY.
Ramsay de Give for NPR
Two chimps groom each other at the Save the Chimps facility in Florida. The National Institutes of Health owns about 360 chimpanzees that aren't yet retired and that are living at research facilities; new guidelines say most of its chimps should be retired.
Save the Chimps