H5N1 avian flu viruses (seen in gold) grow inside canine kidney cells (seen in green). Cynthia Goldsmith/CDC hide caption

toggle caption
Cynthia Goldsmith/CDC

U.S. Says Details Of Flu Experiments Should Stay Secret

  • Download
  • <iframe src="https://www.npr.org/player/embed/144021870/144056115" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

What's in this vial changes from year to year, but the process of creating the flu vaccine remains pretty constant.

Justin Sullivan/Getty Images hide caption

toggle caption
Justin Sullivan/Getty Images

A Haitian protester in Port-au-Prince last month spray-paints a wall, equating the UN mission in Haiti (abbreviated here as MINISTA) with cholera.

Thony Belizaire/AFP/Getty Images hide caption

toggle caption
Thony Belizaire/AFP/Getty Images

Paul Keim at work in his lab on the Northern Arizona University campus.

Charlie McCallie/Northern Arizona University hide caption

toggle caption
Charlie McCallie/Northern Arizona University

Victims of the plague are consigned to a communal burial during the Plague of London in 1665.

Universal Images Group/Getty Images hide caption

toggle caption
Universal Images Group/Getty Images

Decoded DNA Reveals Details Of Black Death Germ

  • Download
  • <iframe src="https://www.npr.org/player/embed/141276449/141303821" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript