When scientist test a new radiation medicine on mice they are amazed to find that it worked. They put the mice to a heavy dose of radiation. After 24 hours they injected them with the antibiotic made naturally from the immune system.  After 30 days the mice who were not injected died and 80% of the  mice that were stayed healthy, and alive. Follow-ups have to made before humans can be treated, but versions of antibiotic and the protein have already been used on humans and looks promising. 
          When the body is exposed to intensive levels of radiation, the bone marrow is one of the first things to shut down.  It is where the while blood cells arise, so the body cant fight off infection any
more. Radiation can cause bactria that are usually confined to the gut to leak, in to the blood causing blood pressure to spike, fever, abnormal blood clotting and even organ failure.