virus

"The top priority is diagnosis — the capability to be able to pick up this virus, should it emerge outside of China," says virologist John McCauley. Flu researchers are getting started on creating a vaccine, but there are still many unknowns.

Scientists are scrambling to understand a bird flu virus never before found in humans. It grabbed world attention this past week after it infected and killed people in China. Weekend Edition Sunday host Rachel Martin talks with Dr. Thomas R. Frieden, director of the U.S. Centers for Disease Control and Prevention.