On the other hand, radioactive contamination dangers are overrated. Take Chernobyl for example, which was much worse than one of these dirty bombs would be. The only deaths were those people actually at the plant fighting the fires. All of the surrounding areas where contamination was believed to be dangerous resulted in no deaths. People who have defied the authorities and gone home and eaten food from their gardens are fine.
At Hiroshima and Nagasaki, those who survived the immediate radiation burns lived long healthy lives. Their children were not born freaks either.
Strange but true. The human body was developed in an environment with radiation omnipresent. It is more resilient than generally thought.