快来比比看,看谁反应快(有声)
Christine Biron studies body's first responders to infection

EarthSky
Christine Biron: The thing about the immune system, is really everyday it keeps us from succumbing to the microbes in our environment. But it’s really heavily armed, and if you can’t hit that balance just right, then your immune system is causing problems that can be more threatening than the infectious organism itself.
Your are listening to scientist Christine Biron, professor of medical sciences at Brown University. She’s talking about the body’s immune system which protects us from disease. Biron studies the role cells called natural killer cells play in our body’s immune response. Biron said natural killer cells are components of white blood cells. She described them as the body’s first responders.
Christine Biron: They really make a difference between health and disease, early on. They can help kill, or directly kill virus- infected cells. But they also can have important roles in translating the information that there is an infection going on to other players, other cells in the immune system.
Biron said medicines can now be developed to let natural killer cells optimize our immune response in the face of chronic infections like HIV/AIDS or herpes.
I'm Jorge Salazar.EarthSky is a clear voice for science.
We’re at EarthSky.org.





